The expenditure of something, such as time or labor, necessary for the.

成本某物的花费，例如时间或劳动，是为达到某一目的而必需的。

youdao

The expenditure of something, such as time or labor, necessary for the.

成本某物的花费，例如时间或劳动，是为达到某一目的而必需的。

youdao