Question

英语翻译1、边际成本曲线（marginal cost）和平均成本曲线都呈U形2、这是边际收益递减规律（diminishi

Answer 1

1.The marginal cost curve and the average cost curve are both tend to be like the shape of U.

2.It attributes to the law of diminishing returns.

3.The law of diminishing returns means: In a short period, with other condition constant,when only one variable input increases, the marginal output firstly increases and decreases after reach the maximum.

4. The marginal cost curve and the average cost curve have upward trend at first and downward at last. It is the U curve that I have mentioned above.