It always takes the class a while to settle down at the start of the lesson.

那个班一上课总得过一会儿才能安静下来。

《牛津词典》

"This is much like 'The Hare and the Tortoise', the faster, but not the winner," thought Lizzy, who, though proud, had enough feeling to take a lesson: The quick, proud may have the start, but the quiet, steady may do more in the end.

“这就像是《龟兔赛跑》，跑得更快的不是赢家。”丽兹心里这样想着，她虽然觉得很骄傲，但也感到自己收获了教训：跑得快、骄傲的人也许赢得起点，但安静、稳重的人最终会做得更多。

youdao

I'm going to explain why I believe this. But let me start with a short history lesson.

在我解释我为什么这么说之前，我想以一个简短的历史经验开始？

youdao

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