,我是一个系统，其余的是周围的环境,那么当我在做所有的化学反应,去四处移动我的手臂的时候,什么量是常数？

What's the one function of state that's constant when I'm doing all my chemical reactions to move my arms around?

youdao

当你准备穿着牛仔裤去上班的时候，得先考虑一下你的工作环境，该穿什么合适。如果你是位银行家或者律师，那么只怕在休闲星期五这天也得穿着西装裤。

Before you slip on a pair of weekday jeans, consider your workplace and what is appropriate-if you are a banker or a lawyer, you might be limited to twill trousers even on Casual Friday!

youdao

在孩子成长过程中，带他们去参观博物馆是一件很有意思的事情，那么我现在为什么不做了呢？

It is fascinating to take your children to museums when they are grown-up - why do we stop these field trips?

youdao

If I went on and told you what the different incident light was, and what the electrons were ejected with, and then you could look up the ionization energy for the particular different elements, you should be able to actually determine exactly which element it is, but just with the information given, we can only narrow it down to these choices here.

如果我继续告诉大家入射光源是什么，出射电子的动能是多少，那么你可以去查一查,以上各个元素的电离能，这样你就应该能确定,这个元素到底是哪个，但是只凭题目中的信息，我们只能把范围缩小至以上几种元素。

麻省理工公开课 - 化学原理课程节选