a reciprocity treaty互惠条约Reciprocity includes more than gifts and favors; it also applies to concessions that people make to one another.互惠不仅仅包括礼物和优待；它对人们之间互相作出的让步也同样适用。
英英词典释义
Noun
1. a relation of mutual dependence or action or influence
2. mutual exchange of commercial or other privileges