One is, he can't afford to have his hoplite line outflanked, because if I can come around and take care of this guy from this side, he is engaged with a guy who's right opposite him, I can just kill him no problem at all.

一点是,他不能让方阵的侧翼被包围,因为如果我调转方向,从这边对付他,他正在和正面的敌人交战,我干掉他就是小菜一碟儿

耶鲁公开课 - 古希腊历史简介课程节选

Newton says F = ma, so to make it a useful result of this problem, we know the mass of this guy.

牛顿指出 F = ma,这对于解决这个问题很有用,我们知道这个物体的质量

耶鲁公开课 - 基础物理课程节选