用全角的，中文标点符号都是全角的，半角使用在英文里的。
ourage and power from
句号 Period [] 用以表示一个句子的结束： Hockey is a popular sport in C The federal government is based in O 用在缩写中： BCis the province located on the West C DBethune was a Canadian who worked in C The company is located at 888 Bay Sin T It is 4:00 in Halifax right 问号 Question Mark ] 在句子的结尾使用问号表示是直接疑问句：How many provinces are there in Canada? 注意：在间接疑问句结尾不要加问号： The teacher asked the class a Do not ask me 叹号 Exclamation Mark [!] 在句子的结尾使用叹号表示惊讶、兴奋等情绪： We won the Stanley Cup! The forest is on fire! 逗号 Comma [,] 句子中的停顿：Therefore,we should write a letter to the prime 在疑问句中引出说话人："I can come today," she said,"but not " 排列三个或以上的名词：Ontario,Quebec,and BCare the three biggest 引出定语从句：Emily Carr,who was born in 1871,was a great 单引号 Apostrophe ['] 表示所有:This is David's These are the player's (Things that belong to the player) Note:对于复数形式的名词,只加' These are the players' (Things that belong to the players) 缩写I don't know how to fix 引号Quotation Marks ["] 直接引出某人说的话： The prime minister said,"We will win the " "I can come today," she said,"but not " 冒号Colon [:] 引出一系列名词：There are three positions in hockey:goalie,defense,and 引出一个较长的引语：The prime minister said:"We will We will not give We will win the next " 分号Semicolon [;] 将两个相关的句子连接起来：The festival is very popular; people from all over the world visit each 和逗号一同使用引出一系列名词：The three biggest cities in Canada are Toronto,Ontario; Montreal,Quebec; and Vancouver,BC 破折号Dash [-] 在一个句子前作总结：Mild,wet,and cloudy - these are the characteristics of weather in V 在一个句子的前面或后面加入额外的注释：The children - Pierre,Laura,and Ashley - went to the Most Canadians - but not all - voted in the last 表示某人在说话过程中被打断：The woman said,"I want to ask - " when the earthquake began to shake the 连字符Hyphen [-] 连接两个单词：sweet-smelling; fire-resistant 将前缀：anti-Canadian; non-contact 在数字中使用：one-quarter; twenty-three
ourage and power from
目前英语中的标点符号主要有这么几种：1）逗号；2）句号；3）问号；4）冒号；5）撇号；6）感叹号；7）双引号；8）连字号。关于如何使用其他答主都有介绍。我可以分享一下标点符号如何翻译？Joy高斋翻译CATTI和MTI分享：希望对你有用。必备|标点符号如何翻译？（附使用规则）比如2016年11月英语三级笔译实务试题原文：Harper Lee was an ordinary woman as stunned as anybody by the extraordinary success of “To Kill a M”里面的双引号。“To Kill a Mockingbird”，英文中的书名通常是斜体或加引号表示或者大写就可以，因为斜体有时候看着不整齐，译文中文需要加上书名号，书名第一次出现，需要括号加注原英文名（人名也这样处理）。还比如14年11月CATTI二级笔译英译汉真题原文：WATERLOO, Belgium --- The region around this Belgian city is busily preparing to commemorate the 200th anniversary in 2015 of one of the major battles in European military 里面的逗号和破折号。WATERLOO, Belgium比利时滑铁卢：这里考察英语地名从小到大，而且加个逗号，汉语里面是从大到小，不加逗号，比如Shanghai, China翻译为中国上海。这是CATTI英译汉高频翻译细节，可是我今天看了大家提交的译文，基本都这样写的：WATERLOO, Belgium --- The region 比利时滑铁卢——：破折号的用法和翻译，这是CATTI英译汉高频翻译细节，经常用在文章或报道的开头，引出事件发生的背景（地点）。翻译的时候保持破折号即可。:Colon（冒号）1．引出表示列举、解释或说明性的词语，翻译的时候保持：The string section consists of four instruments: violin, viola cello, and /His grades are a follows: English, an A; H a B: Science, a D: and Math, a C2．引出对前文进行补充、总结或强调的词语，翻译的时候保持：Judges have a double duty；They must protect the innocent and punish the guilty／ He has only one pleasure: 3．引出较长的正式引语或大段引语，翻译的时候是：或者，In his most famous speech he said: All men are created equal and must enjoy equally the rights that are inalienably 4．用于信件或演说词中的称呼语之后（英国用法中多用逗号），翻译的时候保持：Dear Sir: /Dear Professor Jones: /Ladies and Gentlemen:5．用于公函、政府文件或商业函件的标题或标目之后，翻译的时候保持：TO /SUBJECT: /REFERENCE: /VIA:6．用于时与分之间（英国法中多用句号）、比率数之间、《圣经》的章与节之间，翻译的时候保持：The train is to leave at 8: /Common nouns outnumber proper nouns in proportion /You will find it in Genesis 2: 4-7．分隔书名的标题与副标题，翻译的时候保持：或者破折号NOStromo: A Tale of the Seaboard， Comma（逗号）1．分隔并列成分We are tired, hungry and /Washington was said to be first in war, first in peace, and first in the hearts of his /We were taught how to sit gracefully, how to how to converse 2．分隔并列句中的分句It snowed all night, and the schools were closed the next / We must leave now, or we will miss the / I tried to sleep, but my neighbour's dog made that /It is an imperfect system,yet it is better than 3．分隔对比或对照成分He is sick, not /The more haste, the less 4．分隔非限定性修饰语、同位语或附加说明的词语He found the Paper on the roof, where the newsboy had thrown The the who had cared through the window, went straight to the /They want us, you and me, to go /I have to get up early, particularly on S5．分隔附加疑问句或选择疑问句Tom didn't take it, did he? / Which pencil do you the red one or the blue one?6．分隔直接引语和导语Only a "Sherman said, " would carry on like 7．表示省略相同词语Some went to the right; others, to the 分隔句首状语Usually, he is dressed in blue / Except for physics, my courses are not /When he found that his parents had deserted him, he sat down to 9，常用以分隔用作独立成分、状语等的下列词语Honestly, that's all the money I /Personally, I prefer the other /Unfortunately, they were out when I /To tell you the truth, I was very frightened1) actually, basically, briefly fortunately,frankly, honestly, hopefully, incidentally,luckily, naturally, personally, unfortunately, to tell the truth2) anyhow, anyway, besides, consequent,furthermore, however, likewise, moreover, nevertheless, otherwise, therefore;3)first(ly), second(ly ), last(ly), finally,first of after all, above all, in other words, for example, for instance, that is,namely, , 4)in short, in fact, in conclusion, in a few words, as a result, as a matter of fact, on the contrary, on the other hand;5) of course, by the way, sure enough, between you and me, believe it or not;6)I think, I believe, I suppose, you know,you see, In my opinion;7)yes, no, well, ohAnyhow, even if the problem does arise, it wont affect /I don’t want to go; besides, I’m too /This is, however, another side to this This is our most disastrous and embarrassing defeat eve: in short, a /I don’t like him, in fact,I hate /On the contrary, it hardly ever It's strange, you know, that he hasn’t passed the /In my opinion, he is Yes, times have /Well, not much can be done about it /Oh, David, come here a moment! /Oh no, not again!10．分隔日期、数字、地点Firstly, let me deal with the most important /The cinema is only open to adults, ,people over June 12, 1991/It was on Friday, May 16, in Los A /The price of this sedan car is $12,/He lives at 1515 Halsted SChicago, I11．分隔人名与职称、头衔或倒置姓名I asked my boss for a month's holiday and, believe it or not, he agreed! /By the way, have you seen Tom recently?12．分隔呼语R W Leeds, M D /George Washington, President/Smith, John W, JI would like to ask you, M Jones, for your /Will you see if the door is closed, Janet? /Sir,I'd like to ask a 13．用于信件的称呼语之后（美国用法中多用冒号）或结束语之后Dear Mary, /Sincerely yours, /Yours truly,“ ”Quotation Mark（引号)1．用于直接引语注意下列句子中其他标点符号与引号的相对位置:1）逗号、句号位于引号内（这是美国用法，英国用法多置于引号外）2）不属于引语的问号、感叹号或破折号位于引号之外3）在引语内再用引语时，可用单引号（这是美国用法，在英国用法中，单引号在外，双引号在内）4）引语不止一段时，引号位于各段起始处和最后一段结尾处Michael said, "Let's meet at my house next "/"No, you cant, "she "It's January 1, 1863, Lincoln declared the slaves "forever "/The word"bread, for example, has both standard and slang Why did she say "That is a very selfish attitude"?The witness said, "I distinctly heard him say, Don’t be late, and then heard the door " /The witness said, I distinctly heard him say, Don’t be and then heard the door ’Frequently used signs and symbols are in the back of this Many are found on Symbols include the chemical The chemical elements are also grouped together in the back of this "2．用于引述文章、文艺作品、歌曲、广播及电视节目、绘画等Have you read the article"Shanghai Shows Its Colors"in the January Time? /"Ode to a Nightingale " was written by K /American national anthem is"The Star-spangled B " /YOAS Amencan Mosaic”／ Da Vinci’s“ Mona Lisa "3．用于引述俚语、反语、借用语、定义、词形等Her brother"socked her in the eye and" beaned "her with a /Bob's skiing"vacation"consisted of three weeks with his leg in a / The basic meaning of dumb in both British and American English is“ unable to speak．”／ How do you spell the word＂ eclectic”？;Semicolon（分号）一般说来，分号的作用介于句号与逗号之间，即用分号隔开的两部分之间的关系，比用句号分开的紧密，但不及用逗号分开的紧密。1．用于并列分句之间People make history: unusual people make history /Your car is new; mine is six years /I came, I saw I /it's too late to go for a walk now; besides, it's beginning to /We finally found the gate; however, it had been 2．分隔已有逗号的并列成分，以避免歧义Follow this procedure: first, get your application forms; next, fill them out; last, pay the The sun, a bright yellow ball, shone; the children, happy as always, 3．用于由 for example， for instance， namely，that is（ to say）， in fact，i．e．，e．g等词语引出的分句之前Many of their talents complemented each other; for example, he played the piano and she /Tom is well-liked: in he is the most popular person in the /He chose to invest in major industries: e, steel, automobiles, and — Dash(破折号)用在一个解释性的分句或句子前面：It's an environmental — That's not a small 这是个环境保护的问题，这不是一件小事。用在一个解释性的插入语的前面和后面（相当于一个括号）：During my vacation—I must have been insane—I decided I would 假期中，我准是疯了，我决定去滑雪。用在一个引用的句子前面（代替一个冒号，或与分号一起用）：Uncle Wang laughingly answered—"No, no; stay where you "大叔笑着回答道“不用了，不用了，你就呆到那。”表示意思的突然转折："And may I ask—"said Xiao Wu;" but I guess it's better for you to ask him about "“我可以问——”小吴说；“不过我想还是你问他的好。”表示迟疑犹豫："I—I—I rather think —maybe—Amy has taken "“我——我——我想——或许——是艾米拿了。”总括前面列举的若干东西：News house, larger schools, more sheep, more pigs and chickens, more horses and donkeys—everywhere here shows signs of 新房子，扩建的学校，更多的羊、猪、鸡，更多的马和驴，这里的一切显示出一片繁荣景象。Italicization斜体字的使用1．书籍、报刊、文章、诗歌、乐曲、电影、绘画等的名称Dickens' Oliver Twist /The English-Chinese Dictionary/Readers Digest /The New York TimesMilton's Paradise Lost/Mozart's The Marriage of Figaro/ The Sound of Music /Van Gogh’s StarryNight2．交通工具、航天器等专名Air Force One/Apollo/Challenger3．作为例示的词、字母或数字The word receive is often /The b in comb is silent4，表示强调的词语She never expected such a /woman's place was in the home; it certainly isn’t 5．表示未归化的外来词语In aeternum[L]/ fille[F]6．动物学和植物学中表示属、种、亚种及变种的拉丁语新学名The horse (Equus caballus )has affected the course of history more than any other /The mistletoe (Phoradendron flavescens )is the state flower of O7．法庭案例名称中的原被告姓名Madison Kingley/the Jones case8．剧本中的舞台提示ROBERT: Ah yes, of Sit down, sit down, please, M R [She sits as if this made matters rather ]PHILIP: (Standing guard by her )My wife is a little 取自陆谷孙英译汉大词典
这里是有很规范的标点知识。Joy高斋翻译CATTI和MTI分享：希望对你有用。必备|标点符号如何翻译？（附使用规则）比如2016年11月英语三级笔译实务试题原文：Harper Lee was an ordinary woman as stunned as anybody by the extraordinary success of “To Kill a M”书名号里面的双引号。“To Kill a Mockingbird”，英文中的书名通常是斜体或加引号表示或者大写就可以，因为斜体有时候看着不整齐，译文中文需要加上书名号，书名第一次出现，需要括号加注原英文名（人名也这样处理）。还比如14年11月CATTI二级笔译英译汉真题原文：WATERLOO, Belgium --- The region around this Belgian city is busily preparing to commemorate the 200th anniversary in 2015 of one of the major battles in European military 里面的逗号和破折号。WATERLOO, Belgium比利时滑铁卢：这里考察英语地名从小到大，而且加个逗号，汉语里面是从大到小，不加逗号，比如Shanghai, China翻译为中国上海。这是CATTI英译汉高频翻译细节，可是我今天看了大家提交的译文，基本都这样写的：WATERLOO, Belgium --- The region 比利时滑铁卢——：破折号的用法和翻译，这是CATTI英译汉高频翻译细节，经常用在文章或报道的开头，引出事件发生的背景（地点）。翻译的时候保持破折号即可。:Colon（冒号）1．引出表示列举、解释或说明性的词语，翻译的时候保持：The string section consists of four instruments: violin, viola cello, and /His grades are a follows: English, an A; H a B: Science, a D: and Math, a C2．引出对前文进行补充、总结或强调的词语，翻译的时候保持：Judges have a double duty；They must protect the innocent and punish the guilty／ He has only one pleasure: 3．引出较长的正式引语或大段引语，翻译的时候是：或者，In his most famous speech he said: All men are created equal and must enjoy equally the rights that are inalienably 4．用于信件或演说词中的称呼语之后（英国用法中多用逗号），翻译的时候保持：Dear Sir: /Dear Professor Jones: /Ladies and Gentlemen:5．用于公函、政府文件或商业函件的标题或标目之后，翻译的时候保持：TO /SUBJECT: /REFERENCE: /VIA:6．用于时与分之间（英国法中多用句号）、比率数之间、《圣经》的章与节之间，翻译的时候保持：The train is to leave at 8: /Common nouns outnumber proper nouns in proportion /You will find it in Genesis 2: 4-7．分隔书名的标题与副标题，翻译的时候保持：或者破折号NOStromo: A Tale of the Seaboard， Comma（逗号）1．分隔并列成分We are tired, hungry and /Washington was said to be first in war, first in peace, and first in the hearts of his /We were taught how to sit gracefully, how to how to converse 2．分隔并列句中的分句It snowed all night, and the schools were closed the next / We must leave now, or we will miss the / I tried to sleep, but my neighbour's dog made that /It is an imperfect system,yet it is better than 3．分隔对比或对照成分He is sick, not /The more haste, the less 4．分隔非限定性修饰语、同位语或附加说明的词语He found the Paper on the roof, where the newsboy had thrown The the who had cared through the window, went straight to the /They want us, you and me, to go /I have to get up early, particularly on S5．分隔附加疑问句或选择疑问句Tom didn't take it, did he? / Which pencil do you the red one or the blue one?6．分隔直接引语和导语Only a "Sherman said, " would carry on like 7．表示省略相同词语Some went to the right; others, to the 分隔句首状语Usually, he is dressed in blue / Except for physics, my courses are not /When he found that his parents had deserted him, he sat down to 9，常用以分隔用作独立成分、状语等的下列词语Honestly, that's all the money I /Personally, I prefer the other /Unfortunately, they were out when I /To tell you the truth, I was very frightened1) actually, basically, briefly fortunately,frankly, honestly, hopefully, incidentally,luckily, naturally, personally, unfortunately, to tell the truth2) anyhow, anyway, besides, consequent,furthermore, however, likewise, moreover, nevertheless, otherwise, therefore;3)first(ly), second(ly ), last(ly), finally,first of after all, above all, in other words, for example, for instance, that is,namely, , 4)in short, in fact, in conclusion, in a few words, as a result, as a matter of fact, on the contrary, on the other hand;5) of course, by the way, sure enough, between you and me, believe it or not;6)I think, I believe, I suppose, you know,you see, In my opinion;7)yes, no, well, ohAnyhow, even if the problem does arise, it wont affect /I don’t want to go; besides, I’m too /This is, however, another side to this This is our most disastrous and embarrassing defeat eve: in short, a /I don’t like him, in fact,I hate /On the contrary, it hardly ever It's strange, you know, that he hasn’t passed the /In my opinion, he is Yes, times have /Well, not much can be done about it /Oh, David, come here a moment! /Oh no, not again!10．分隔日期、数字、地点Firstly, let me deal with the most important /The cinema is only open to adults, ,people over June 12, 1991/It was on Friday, May 16, in Los A /The price of this sedan car is $12,/He lives at 1515 Halsted SChicago, I11．分隔人名与职称、头衔或倒置姓名I asked my boss for a month's holiday and, believe it or not, he agreed! /By the way, have you seen Tom recently?12．分隔呼语R W Leeds, M D /George Washington, President/Smith, John W, JI would like to ask you, M Jones, for your /Will you see if the door is closed, Janet? /Sir,I'd like to ask a 13．用于信件的称呼语之后（美国用法中多用冒号）或结束语之后Dear Mary, /Sincerely yours, /Yours truly,“ ”Quotation Mark（引号)1．用于直接引语注意下列句子中其他标点符号与引号的相对位置:1）逗号、句号位于引号内（这是美国用法，英国用法多置于引号外）2）不属于引语的问号、感叹号或破折号位于引号之外3）在引语内再用引语时，可用单引号（这是美国用法，在英国用法中，单引号在外，双引号在内）4）引语不止一段时，引号位于各段起始处和最后一段结尾处Michael said, "Let's meet at my house next "/"No, you cant, "she "It's January 1, 1863, Lincoln declared the slaves "forever "/The word"bread, for example, has both standard and slang Why did she say "That is a very selfish attitude"?The witness said, "I distinctly heard him say, Don’t be late, and then heard the door " /The witness said, I distinctly heard him say, Don’t be and then heard the door ’Frequently used signs and symbols are in the back of this Many are found on Symbols include the chemical The chemical elements are also grouped together in the back of this "2．用于引述文章、文艺作品、歌曲、广播及电视节目、绘画等Have you read the article"Shanghai Shows Its Colors"in the January Time? /"Ode to a Nightingale " was written by K /American national anthem is"The Star-spangled B " /YOAS Amencan Mosaic”／ Da Vinci’s“ Mona Lisa "3．用于引述俚语、反语、借用语、定义、词形等Her brother"socked her in the eye and" beaned "her with a /Bob's skiing"vacation"consisted of three weeks with his leg in a / The basic meaning of dumb in both British and American English is“ unable to speak．”／ How do you spell the word＂ eclectic”？;Semicolon（分号）一般说来，分号的作用介于句号与逗号之间，即用分号隔开的两部分之间的关系，比用句号分开的紧密，但不及用逗号分开的紧密。1．用于并列分句之间People make history: unusual people make history /Your car is new; mine is six years /I came, I saw I /it's too late to go for a walk now; besides, it's beginning to /We finally found the gate; however, it had been 2．分隔已有逗号的并列成分，以避免歧义Follow this procedure: first, get your application forms; next, fill them out; last, pay the The sun, a bright yellow ball, shone; the children, happy as always, 3．用于由 for example， for instance， namely，that is（ to say）， in fact，i．e．，e．g等词语引出的分句之前Many of their talents complemented each other; for example, he played the piano and she /Tom is well-liked: in he is the most popular person in the /He chose to invest in major industries: e, steel, automobiles, and — Dash(破折号)用在一个解释性的分句或句子前面：It's an environmental — That's not a small 这是个环境保护的问题，这不是一件小事。用在一个解释性的插入语的前面和后面（相当于一个括号）：During my vacation—I must have been insane—I decided I would 假期中，我准是疯了，我决定去滑雪。用在一个引用的句子前面（代替一个冒号，或与分号一起用）：Uncle Wang laughingly answered—"No, no; stay where you "大叔笑着回答道“不用了，不用了，你就呆到那。”表示意思的突然转折："And may I ask—"said Xiao Wu;" but I guess it's better for you to ask him about "“我可以问——”小吴说；“不过我想还是你问他的好。”表示迟疑犹豫："I—I—I rather think —maybe—Amy has taken "“我——我——我想——或许——是艾米拿了。”总括前面列举的若干东西：News house, larger schools, more sheep, more pigs and chickens, more horses and donkeys—everywhere here shows signs of 新房子，扩建的学校，更多的羊、猪、鸡，更多的马和驴，这里的一切显示出一片繁荣景象。Italicization斜体字的使用1．书籍、报刊、文章、诗歌、乐曲、电影、绘画等的名称Dickens' Oliver Twist /The English-Chinese Dictionary/Readers Digest /The New York TimesMilton's Paradise Lost/Mozart's The Marriage of Figaro/ The Sound of Music /Van Gogh’s StarryNight2．交通工具、航天器等专名Air Force One/Apollo/Challenger3．作为例示的词、字母或数字The word receive is often /The b in comb is silent4，表示强调的词语She never expected such a /woman's place was in the home; it certainly isn’t 5．表示未归化的外来词语In aeternum[L]/ fille[F]6．动物学和植物学中表示属、种、亚种及变种的拉丁语新学名The horse (Equus caballus )has affected the course of history more than any other /The mistletoe (Phoradendron flavescens )is the state flower of O7．法庭案例名称中的原被告姓名Madison Kingley/the Jones case8．剧本中的舞台提示ROBERT: Ah yes, of Sit down, sit down, please, M R [She sits as if this made matters rather ]PHILIP: (Standing guard by her )My wife is a little 取自陆谷孙英译汉大词典
前几天，叔叔送给我一只小狗。它长得可爱极了。 这只小狗有着黑黑的眼睛，还有一对大耳朵，那样子长得可逗人了。它身上的毛色黑白相间，尾巴和爪子却是纯白色的，那白色的小尾巴平时总是一摇一摆的，四只雪白雪白的爪子像穿着干干净净的白袜子，很叫人喜欢。 小狗很喜欢我给它的食物，吃饱了总是一幅心满意足的样子。有时它喜欢抱着我的鞋啃着玩，玩累了就找个地方呼呼大睡起来。睡醒后，它喜欢东张西望的找我，让我陪着它玩。 我喜欢这只可爱的小狗，它已经成了我最好的伙伴。
写最后一个格的外面！引号的话结束后，有两种情况：第一，引用别人的是一个完整的句子，就将标点标在引号的里面；第二，引用的只是一个词，或在引用句子后仍然有部分话语要说，则将标点标在外面。另外，一般论文当中不会掺杂个人过多的情感，所以论文中不用感叹号！
标点符号解析，看完了你就不易用错了
1、中文的在中文输入法下输入，英文的在英文输入法下输入。2、中文的标点符号随它之前的文字走，前面的文字是什么体，标点符号也用什么体。3、两种文献不使用统一格式的标点符号，各用各的。
参考文献的标点符号是全角的。参考文献的类型根据GB3469-83《文献类型与文献载体代码》规定，以单字母标识：M——专著(含古籍中的史、志论著)C——论文集N——报纸文章J——期刊文章D——学位论文R——研究报告S——标准P——专利A——专著、论文集中的析出文献Z——其他未说明的文献类型扩展资料论文的种类1、专题型这是分析前人研究成果的基础上，以直接论述的形式发表见解，从正面提出某学科中某一学术问题的一种论文。2、论辩型这是针对他人在某学科中某一学术问题的见解，凭借充分的论据，着重揭露其不足或错误之处，通过论辩形式来发表见解的一种论文。3、综述型这是在归纳、总结前人或今人对某学科中某一学术问题已有研究成果的基础上，加以介绍或评论，从而发表自己见解的一种论文。4、综合型这是一种将综述型和论辩型两种形式有机结合起来写成的一种论文。参考资料来源：百度百科——论文
英文用半角，中文是全角。不同的标点符号用在不同的地方，会表达不同的意思。标点符号并不属于个人写作风格，也不属于个人意愿，而是根据所要表达的意思存在一定的规范。本文中的所有示例均用(W) 表示错误，(R)表示正确。句点主要用在一个完整的陈述句或祈使句的结尾，表示句子的陈述语气以及句子的结束。与中文句号“。”不同，英文的句号形式是一个小黑点“ ”。示例1：Local scour around bridge piers have resulted in more bridge failures than any other 扩展资料句点也可用于单词的缩写，如for example 缩写为 ，et cetera 缩写为，et alia 缩写为et ，在作者单位中我们常见的Limited Company 缩写为C ，L ，在以上例子中，句点都不可以省略。需要注意的是，如果缩写的单词形成了一个新的单词作为整体，那么此时句点可以省略，如United Statesof America 可直接写为USA，Geography Information System 直接写为GIS，Back Propagation 直接写为BP，Support Vector Machine 直接写为SVM 等。参考资料来源：百度百科-参考文献
“题”如果是诗文、图书、报告或其他作品的标题，可作为篇名、书名看待，用书名号；如果是写作、科研、辩论、谈话的主题，则用引号，因为后者不是作品的名称。百度搜索以为题_htm有很详细的解释
用双引号比较合适
引号
文章标题中标点符号的使用一般有下面几种情况。1．文章的标题不管是一个词语、单句还是复句，句末都不加句号。因为句号表示一句话完了，而标题是作者对全文内容的概括，没有用句号的必要。如：《孔乙己》（鲁迅）、《人民解放军百万大军横渡长江》（毛泽东）、《正确的观察 错误的抽象》（《语文学习》1991年第6期）。2．文章标题是复句，中间可加逗号，句末仍然不用句号。如：《得道多助，失道寡助》，《生于忧患，死于安乐》（初中语文第五册）。3．标题中间可以加顿号、逗号。如《子路、曾皙、冉有、公西华侍坐》高中语文第五册），《地球，我的母亲》（郭沫若）。4．标题表示疑问或感叹语气的，可以加问号或感叹号，也可以不加。如《人的正确思想是从哪里来的？》（毛泽东），《中国人失掉自信力了吗》（鲁迅），《让青春发出光和热吧！》（秦牧），《别了，哥哥》（殷夫）。5．标题中可以用破折号、省略号。如：《大堰河——我的保姆》（艾青），《生命最珍贵的……》（1998年湖北省荆门市中考作文题）。6．标题中可以用冒号。如：《语感：一个理论与实践的热点》（《语文学习》1993年第3期）。7．标题中可以用引号、书名号。如：《“友邦惊诧”论》（鲁迅），《〈呐喊〉自序》（鲁迅）。8．标题中可以用间隔号。如《沁园春·长沙》（毛泽东）。9．由两句话或两个短语构成的标题，除上面说的用逗号或间隔号外，也可以在中间空一格。如《着意锤练 平易自然》（《语文月报》第218期）。10．如果文章标题有副标题，在副标题前要用破折号。如：《为了周总理的嘱托——记农民科学家吴吉昌》（穆青、陆拂为、廖由滨）。综上所述，文章的标题不用句号，使用其它标点要由标题本身来决定，而不能随意乱用。