先天性 小结 心胀病 dui yu xian tian xing xin zhang bing lun wen xiao jie
儿童 囊肿 总管 先天性 er tong xian tian xing dan zong guan nang zhong lun wen
先天下之忧而忧 范仲淹 fan zhong yan xian tian xia zhi you er you lun wen
先天下之忧而忧 爱国主义 ai guo zhu yi xian tian xia zhi you er you lun wen