I am the enemy you killed, my friend.

我是被你杀死的敌人，亲爱的。

耶鲁公开课 - 现代诗歌课程节选

I think they should, one, realize that teachers aren't their enemies.

我觉得他们应该，一是，意识到老师不是他们的敌人。

体罚是不可取的 - SpeakingMax英语口语达人

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