lesson

英 ['les(ə)n] 美['lɛsn]

acquire a greater understanding of the world through a particular unpleasant or stressful experience

吸取教训

punish or hurt someone as a deterrent

惩戒，教训

they were teaching me a lesson for daring to complain.
他们为我胆敢抱怨而给我颜色看。

1. He learned this lesson the hard way from his own personal experience.: 吃一堑长一智，他这个教训来之不易——是从他自己的亲身经历中得来的。

2. The lesson from all of this is perhaps a broader one.: 从所有这一切中得出的教训可能具有更广泛的意义。

4. His sailing instructor fell overboard and drowned during a lesson.: 他的航海教练在一次训练课时从船上失足跌入水中，溺水身亡。