altruistic

The avianize of altruistic behavior depends on their high cost and low income.

他行弱化在于他行的高成本低收益。

The strength of altruism lies in the fact that altruistic acts undeniably occur in any society and that moral codes universally advocate altruism or benevolence and condemn selfishness.

毫无疑问,他义存在于任何社会,而且道德准也普遍提倡他义或善良行,而谴责自私自。这也正是他义具有强大生命力的原因。