reciprocity

名词 reciprocity:

1. a relation of mutual dependence or action or influence
   同义词：reciprocality
2. mutual exchange of commercial or other privileges

rec.i.proc.i.ty

n.（名词）
【复数】 rec.i.proc.i.ties 缩写 recip.
A reciprocal condition or relationship.
相互性：一种交互的状况或关系
A mutual or cooperative interchange of favors or privileges, especially the exchange of rights or privileges of trade between nations.
互惠：一种相互间的或合作性的交换优惠待遇或特权，尤指国家之间交换贸易的权力或特权