一般说来，边际贡献是正数，它可以表示为贡献总额、单位边际贡献和边际贡献率。

Generally, the contribution is positive. It can be expressed in total, per unit and percent.

youdao

一般说来，边际贡献是正数，它可以表示为贡献总额、单位边际贡献和边际贡献率。

Generally, the contribution is positive. It can be expressed in total, per unit and percent.

youdao