互惠的利他主义，互利主义

reciprocal leveling───对向水准测量

reciprocal arrangement───互惠协议

reciprocality───相互；互惠

reciprocally───adv.相互地；相反地；互惠地

reciprocalness───相互作用

reciprocals───n.[数]倒数（reciprocal的复数形式）

reciprocants───相互的

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 ”

According to reciprocal altruism, evolution favors organisms that sacrifice their good for others in order to gain a favor in return.───根据互利主义理论，进化有利于为其他有机体舍弃利益以获得好感的有机体。

Accordingly, this paper further analyzes the political and economic implications of reciprocal altruism theory.───在此基础上, 本文进一步分析了互惠利他理论的政治和经济学蕴意.

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”。

Behaviorists often reduce what we call empathy to a mercantile business known as reciprocal altruism.───原来这是因为我们的”移情“在行为学者看来只是一种”重商“的东西:相互利用.

Reciprocal altruism and kin selection are the two main theories.───互利主义和亲族选择是两个主要理论。

In reciprocal altruism individuals are not required to have any particular genetic relatedness with one another.

So, it looks like a promising case for a bit of reciprocal altruism.

For reciprocal altruism in mobile animals, as demonstrated by packer in baboons, more is needed.

The criteria for reciprocal altruism seem fulfilled as the interactions seem based upon expectations of reciprocation.

In order for the altruist not to be exploited by non-reciprocaters, it would be expected that reciprocal altruism can only exist in the co-presence of mechanisms to identify and punish "cheaters".