Therefore, there is selfish motive hiding behind reciprocal altruistic behavior.

可见在互惠利他行为的背后隐藏着自私的动机.

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Such altruistic behavior is one of the noblest attributes of our species.

这样的利他行为是我们人类最高贵的品质之一.

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The second form is reciprocal altruism , or " you scratch my back and I'll scratch yours "

另一种形式则是互惠型的利他行为, 或称为 “ 狼狈为奸,唯利是图 ”

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There is also fear that his altruism may be motivated by calculated gamesmanship.

还有人担心,安巴尼的利他行为可能是精心设计的花招.

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We're all convinced, really are certain altruistic behaviours which only appear under conditions of group selection.

我们都被说服了, 真的:某些特定的利他行为只有在群体选择的条件下才会出现.

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But I wasn't just being altruistic.

不过,我这不仅仅是一种利他行为.

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