You would also engage in sports together, and you would develop a camaraderie because you were expected then to be the fighting force for your city, your city-state.

一起参加体育运动，培养友谊,因为他们将成为这座城市，这座城邦的，主要战斗力。

耶鲁公开课 - 新约课程节选

During the lunch of the first day, their project groups were assigned eating, so we asked them to sit together over lunching beginning to develop their pool getting to know each other.

在第一天的午饭时间，项目组的同学一起吃饭，我们要求他们坐在一起,形成自己的圈子,并相互了解。

麻省理工公开课 - 媒体、教育、市场课程节选