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

you're the face, you're the person who's supposed to keep the troop, you know, the, the rank and file motivated.

你是球队的标志，是保持球队战斗力和激情的主心骨。

足球部队长的领导力 - SpeakingMax英语口语达人

They would have decided on the basis of what was most effective and you would not want old guys.

他们以战斗力为基础进行决定,你也不想用老弱残兵吧

耶鲁公开课 - 古希腊历史简介课程节选