So, you have to imagine that this thing started with these guys back in their camp and the other army back in its camp, and they both have to agree that they want to have a battle, for a battle to take place, and they will have picked a place that is flat where they can do what they're doing.

所以事情是这样的,你得想象一下,一群人各属于不同阵营,他们都同意开战,为了进行战斗,他们需要挑选一块平地,以供双方的方阵摆开架势

耶鲁公开课 - 古希腊历史简介课程节选