The museum's exhibits provide a lesson in modern European and American history.

VOA: special.2009.01.02

And as I'm going to do many times in 3.091, I'm going to start a unit like this with a history lesson.

在3。091这门课上我会重复很多次，我会像现在一样以一个历史的故事,来开始新的一单元。

麻省理工公开课 - 固态化学导论课程节选

It also is a good lesson in how difficult it is, and we'll talk about this in a subsequent class, to actually measure what people eat.

同样这能很好的说明,实际评价人们的饮食有多困难,我们下节课会讨论这个话题

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

"Louie's life is a lesson in perseverance.

VOA: special.2011.05.04

In a sense, this is the first difficult lesson of the class.

这是这门课第一个较难的结论

耶鲁公开课 - 博弈论课程节选

With schools closed for a holiday, some parents took the opportunity to teach their children a lesson in charity.

VOA: standard.2010.01.18

That's a very important lesson to keep in mind.

这一点非常重要,要牢记心中

耶鲁公开课 - 金融市场课程节选

The mother has to save Bill from getting punished and,in the process, she teaches her husband a lesson.

VOA: special.2009.05.04

Then much later on, when we looked at some more complicated payoffs and a more complicated game, we looked at a different lesson which was this: put yourself in others' shoes to try and figure out what they're going to do.

在这之后我们通过研究更复杂的收益,以及更复杂的博弈,我们得出了另外一个结论,站在别人的立场去思考,他们会怎么做

耶鲁公开课 - 博弈论课程节选

One story line in "The Immortal Life of Henrietta Lacks" is like a history lesson.

VOA: special.2010.07.21

But in return,Heller's surfing adventure helped him learn a valuable lesson about catching the perfect wave in life.

VOA: standard.2010.08.04

The success of the business, Cruz says,has taught her a valuable lesson in life.

VOA: standard.2009.12.04