income-cost

常見(jiàn)例句

• 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，必須改變利他行為的成本收益比，提高利他行為的收益來(lái)激發(fā)人們的利他行為。
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