[经] 时机代价, 机会成本

词型变化：名词复数形式 : opportunity costs

opportunity cost的用法和样例：

例句

The alternative forgone is called the opportunity cost.这种选择性的放弃就叫做机会成本。
They have tended to assume increasing opportunity costs.他们往往假定机会成本是递增的。

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