Let's look at the blackboard.

让我们看黑板吧。

youdao

So, let's say that I'm going to look first at what happens if I'm in the right half of a plane of a blackboard, so, in the yz plane.

我们看看先发生了什么，如果黑板是yz平面上的右半平面。

youdao

First, let's see some new words, look at the blackboard and read after me.

首先，让我们先来看一些生单词，请看黑板，并跟着我朗读。

youdao