Social exchange theory argues that relationships are a form of exchange between people, attempts to gain benefits from their interaction while avoiding the costs.

社会交换理论认为，关系是人与人之间交换的一种形式，试图从他们的互动中获得利益，同时避免付出代价。

You also learned about altruism, the bystander effect, and when we are more or less likely to help a person in need, and also about the social exchange theory, the reciprocity norm, the social responsibility norm, and social traps.

您还了解了利他主义、 旁观者效应，以及我们何时或多或少地帮助有需要的人， 以及社会交换理论、 互惠规范、社会责任规范和社会陷阱。