Psychologists call this the reciprocity rule, and it is a rule that all societies honour.
心理学家把这种行为称为互惠原则，这是所有社会都遵循的原则。
The researchers say the reciprocity rule explains their findings — people felt obligated to return the act of generosity.
实验者称交互作用法使这项研究的最好解释——人们在接受他人慷慨后感觉自己有义务作出回报。
Treat others as you would like to be treated: this is known as the Ethic of Reciprocity, or the "Golden Rule". Imagine if everyone lived by this principle.
自己想要怎样被对待就这样对待别人：这被称作平等的对待，或“黄金法则'.”想像一下如果都按这个原则会怎样。
It is a golden rule that good relations should be based on reciprocity: while China is quite welcoming, it kind of makes me sad to see some countries are not exactly welcoming in return.
友好关系是建立在对等的基础上。当中国对待外国人热情欢迎时，我很难受的看到一些国家并没有同样的欢迎态度。
It is a golden rule that good relations should be based on reciprocity: while China is quite welcoming, it kind of makes me sad to see some countries are not exactly welcoming in return.
友好关系是建立在对等的基础上。当中国对待外国人热情欢迎时，我很难受的看到一些国家并没有同样的欢迎态度。
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