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

VOA: special.2010.07.21

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

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

VOA: special.2009.01.02