marginal activities

• 边际活动

marginal activities的用法和样例：

例句

1. People stop at the point where the marginal cost equals the marginal benefit.
   当边际成本等于边际效益，就是活动停止的时候。
2. The theory of marginal utility was applied to production as well as to consumption.
   边际效用理论被应用到生产及消费活动中。