毕业论文中有段话要翻译成英文

At introduced the concept of marginal cost, recall that if the cost function C (x) express the production of x items cost, then marginal costs are C vis-à-vis the rate of change of x. That is, the marginal cost function is the derivative of cost function C '(x). Give a typical cost function graphics, the marginal cost C '(x) is the cost curve at (x, C (x)) the slope of tangent points. Attention because of the beginning of the production scale in a more economical, cost curves are concave, the inflection point, the cost curve on the concave, it may be too large or because the cost of mass production efficiency. The average cost function c (x) = C (x) / x, that the production of x pieces of product, the cost per item. Give the average cost of a typical graphics function, C (x) / x are connecting the origin and the point (x, C (x)) the slope of a straight line. Clearly there is a minimum. Request a minimum, at the use of derivative equation divider rule to find the critical point c: If you have the minimum average cost, then marginal cost = average cost This rule is obvious, because if the marginal cost is less than the average cost, we can produce more products, which can reduce the average cost. Similarly, when the marginal cost is greater than the average cost, we can lower the average cost of production to reduce. Consider the following market conditions, so that P (x) for the company to sell products x pieces of each product price, p is called the demand function, it should be decreasing function of x. If x items sold, the price of each product p (x), while total income for: R known as the revenue function, revenue function of the derivative R 'is called the marginal revenue function, which are income and relative to changes in the ratio of quantity sold. If the products sold x, then the total profit p as the profit function, the marginal profit function for the p ', is a derivative of profit function, if profit maximization, need to find the critical point p, that is, at this point the marginal profit is 0. If the profit has maximum value, then the marginal revenue = marginal cost To verify that the maximum has to satisfy the clause, see, the use of secondary authentication derivation. That is, the marginal increase in revenue faster than the slow increase in marginal cost, the profit maximum. 看看吧！

Internal and external candidates to recruit from the source of recruitment to the recruitment of the demarcation of the two can meet the human resources requirements of the recruitment programme, but both have their own advantages and disadvantages, reinforcing this analysis of the advantages and disadvantages of the two, from the enterprise on the basis of the business strategy, job characteristics, and other aspects of the enterprise both in the choice of personnel recruitment, the point of integration and balance, the enterprise human resources recruitment of a certain significance.

jackychen0201真强，建议采用其，一楼也可以，但是语法有错

At introduced the concept of marginal cost, recall that if the cost function C (x) express the production of x items cost, then marginal costs are C vis-à-vis the rate of change of x. That is, the marginal cost function is the derivative of cost function C '(x). Give a typical cost function graphics, the marginal cost C '(x) is the cost curve at (x, C (x)) the slope of tangent points. Attention because of the beginning of the production scale in a more economical, cost curves are concave, the inflection point, the cost curve on the concave, it may be too large or because the cost of mass production efficiency. The average cost function c (x) = C (x) / x, that the production of x pieces of product, the cost per item. Give the average cost of a typical graphics function, C (x) / x are connecting the origin and the point (x, C (x)) the slope of a straight line. Clearly there is a minimum. Request a minimum, at the use of derivative equation divider rule to find the critical point c: If you have the minimum average cost, then marginal cost = average cost This rule is obvious, because if the marginal cost is less than the average cost, we can produce more products, which can reduce the average cost. Similarly, when the marginal cost is greater than the average cost, we can lower the average cost of production to reduce. Consider the following market conditions, so that P (x) for the company to sell products x pieces of each product price, p is called the demand function, it should be decreasing function of x. If x items sold, the price of each product p (x), while total income for: R known as the revenue function, revenue function of the derivative R 'is called the marginal revenue function, which are income and relative to changes in the ratio of quantity sold. If the products sold x, then the total profit p as the profit function, the marginal profit function for the p ', is a derivative of profit function, if profit maximization, need to find the critical point p, that is, at this point the marginal profit is 0. If the profit has maximum value, then the marginal revenue = marginal cost To verify that the maximum has to satisfy the clause, see, the use of secondary authentication derivation. That is, the marginal increase in revenue faster than the slow increase in marginal cost, the profit maximum.

这段话翻译过来是这个意思: Internal employment advertise and exterior employment advertise are make from personnel's employment advertise origin to the employment advertise division, the two all can satisfy the enterprise human resources employment advertise plan the request, but the two have the good and bad points respectively, complements one another; This article in the two good and bad points analysis foundation from enterprise's management strategy, position aspects and so on characteristic has discussed the enterprise when the personnel employment advertise the two choice combining site and the balance point, has certain guiding sense to enterprise's human resources employment advertise work. Key word: Internal advertises for exterior employment advertise balance

Floret puccinellia tenuiflora lacks a homologous expression system, as well as genetically modified flowers puccinellia tenuiflora plant materials for easy access to difficult points, grew up spending the initial establishment of the system of puccinellia tenuiflora in suspension culture cells and its biological characteristics of starting, efficient transformation by Agrobacterium with a view to preparing for the receptor material, and develop an effective transformation of the programme, so as to establish an efficient conversion modes. Flowers gained puccinellia tenuiflora cognate expression system will be more stable and accurate genus puccinellia tenuiflora gene function analysis.