1. Reciprocation All societies subscribe to a norm that obligates individuals to repay in kind what they have received. 互惠所有的社会都认同一个准则，即每个人都要对自己的所得作出回报。
2. But in the higher control of mind and development of intellectual and spiritual reciprocation, you are somewhat inferior. 但是更高的心智控制和智力的发展以及灵性互换，你们稍微有些差强人意。
3. This strategy of behaving altruistically at first, but withdrawing aid in the case of non-reciprocation is similar to the tit for tat strategy in game theory. 这一行为策略首先表现出利他，但在无互惠的情况下撤回援助，与博弈论的同等回报策略相类似。
英英解释
n.
1. the act of making or doing something in return
2. alternating back-and-forth movement
3. mutual interaction; the activity of reciprocating or exchanging (especially information)
