青云翻译

This issue relates to the marginal output, add some more additional investment may be inefficient, because the return on investment we can not see

This involves the problem of marginal output, some additional input may be more efficient than poor, because the return on investment in the US is not to

This involves the question which delivers to the boundary, increases some extra investment possible efficiency quite to be bad, because invests to repay us is blind

This involves the marginal output increased by more than a number of additional inputs may efficiency because the investment is relatively poor, but we cannot see the return of

This involves the problem of marginal output, some additional input may be more efficient than poor, because the return on investment in the US is not to