Suppose there's a common resource out there, maybe it's a fish stock or maybe it's the atmosphere.

假如这里有一个可利用的公共资源,比如是个鱼群,或者是新鲜的空气

耶鲁公开课 - 博弈论课程节选

just places that... don't have so much access to education

或者是教育资源不够充足的国家。

MIT赛艇选手 - SpeakingMax英语口语达人