They are involved in commerce, some of them, but mostly what they do is they serve the state.

他们有的从事商业,但他们是大多是为国家效力的

耶鲁公开课 - 欧洲文明课程节选

How many of you, if you were playing for, I guess it's going to be America, which is a sad thing to start with,never mind.

有多少人会,假设你为一个球队效力,比如说是美国国家队吧,可能有些难以启齿,没关系

耶鲁公开课 - 博弈论课程节选