cost benefit

• 成本收益

cost benefit的用法和样例：

例句

1. So we must change the proportion of the cost and income for the altruistic behavior, and arouse persons' altruistic behavior by improving the income for the altruistic behavior.
   因此，必须改变利他行为的成本收益比，提高利他行为的收益来激发人们的利他行为。