首先，我想简单，复习一下我们知道的，有关于圆形轨道的知识，我在黑板上写下了，我们已有的知识。

I first want to review with you briefly what we know about circular orbits, so I wrote on the blackboard everything we know about circular orbits.

youdao

现在我们要建立我们的-,你们都已经收到邮件了吧,你们都知道需要安排一下复习的时间-,然后我这里还剩下几分钟。

So, we are setting up our-- you have already gotten email and you've talked about setting up your review sessions-- so I have a few more minutes here.

youdao

我在白板上写了一下这些，我们来复习一下。

I've put on the board up here the following and we're going to review this.

youdao

I've put on the board up here the following and we're going to review this.

我在白板上写了一下这些,我们来复习一下

耶鲁公开课 - 聆听音乐课程节选

You guys have also seen vectors, I'm pretty sure, but it is worth going over some properties and some may be new and some may be old.

我很肯定你们曾接触过矢量,但复习一下相关的性质是很有必要的,有些可能是新知识,有些是已经学过的

耶鲁公开课 - 基础物理课程节选

.. So, we are setting up our-- you have already gotten email and you've talked about setting up your review sessions-- so I have a few more minutes here.

现在我们要建立我们的-,你们都已经收到邮件了吧,你们都知道需要安排一下复习的时间-,然后我这里还剩下几分钟。

耶鲁公开课 - 金融市场课程节选