第二次课上，达尔西小姐又飞离了地面。

At the next class, Miss Dulcie rose off the floor once more.

youdao

这是你第二次在复习课上问快捷办法了，你还真猴急哈！

That is the second time you've asked for something real quick in these review sessions. You are in a hurry.

youdao

这是她第二次在数学课上睡着了。

It is the second time that she has fallen asleep in math class.

youdao

And as a reminder, hopefully I don't need to remind any of you, but exam 1 is on Wednesday, so rather than our clicker question being on something from last class, which is exam 2 material, let's just make sure everyone remembers some small topic from exam 1 material, which is the idea of angular nodes.

而作为一个提醒--我希望大家都不需要提醒，但是这周三就要进行第一次考试了，因此我们的这个选择题,不是关于上节课内容的，那是第二次考试的内容，这里只是想确认大家都记得,第一次考试所要求的一些小问题，也就是关于角向节点的概念。

麻省理工公开课 - 化学原理课程节选