解释如何计算加权单位产品贡献毛益。

Explain how to calculate a weighted average contribution margin per unit.

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像Linux内核一样，Git现在由许多开源开发人员贡献产品增强、bug修复和其他内容。

Like the Linux kernel, Git is now the product of enhancements, bug fixes, and other contributions from countless open source developers.

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Scrum团队的成员则可以通过任何可行的方式进行协作，为团队和产品的成功作出贡献。

A member of a Scrum team is expected to collaborate and contribute in whatever way they can to the over-all success of their team and product.

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