reciprocity

互惠，互换un.

• They said they would press for reciprocity with Greece in the issuing of visas.

  他们说，他们将会对希腊施压，以达成签证发放的互惠。

• "Rats have been shown to engage in multiple forms of reciprocal help and cooperation, including what is referred to as direct reciprocity where a rat will help another rat that has previously helped them," says Quinn.

  “已有研究表明，老鼠会进行多种形式的互助及合作，其中包括被称为‘直接互惠’的行为，即老鼠会帮助之前曾帮助过自己的另一只老鼠。”奎因说道。