The conclusion of this parable seems so violent perhaps because the lesson to be learned from the parable is so uncertain.

这个故事的结尾看起来太残酷了,可能因为这个寓言想要教给我们的东西太不确定。

耶鲁公开课 - 弥尔顿课程节选

And frankly, even I never quite learned that lesson.

坦白说，即使是我也从没完全记住教训。

哈佛公开课 - 计算机科学课程节选

And eight years later Nixon seemed to have learned his lesson.

而八年后尼克松似乎也学到了教训

耶鲁公开课 - 博弈论课程节选