做化学实验时，指示剂是必不可少的。

Indicators are indispensable for doing chemical experiments.

youdao

心不在焉地做化学实验会导致重大事故。

Absence of mind in chemical experiments may cause a serious accident.

youdao

爱迪生十岁时，就已经开始做化学实验了。

By the time he was ten, Edison was already doing his experiments in chemistry.

youdao

As soon as you allow anything to mix, like you might if you want to do any chemistry, entropy changes.

只要你允许物质混合，就像你做任何化学实验的时候要做的，熵就会发生变化。

麻省理工公开课 - 热力学与动力学课程节选

But, I think what most of you, actually having MIT come to MIT, have probably realized is sometimes it's nice to major in a science, because you can't just pick up a reaction and do it in your kitchen on the weekend, where as you can sometimes join a book group and do that.

但我认为对你们大多数人来说,既然来了,可能已经意识到最好是主修一门科学,因为你不能在你,周末的时候在厨房里做化学实验,然后你就可以参加一个读书俱乐部。

麻省理工公开课 - 化学原理课程节选