我能给你的最简单的定义是光谱学是研究物质和光之间相互作用的学科。

The simplest definition I can give you is that Spectroscopy is the study of the interaction between matter and light.

youdao

这听起来可能很奇怪，但事实是在大爆炸的那一刻，物质和反物质都是在很短的时间内被创造出来的，我的意思是只有几分之一秒。

That may sound odd, but the fact is at the moment of the Big Bang, both matter and anti-matter were created for a short time, and I mean just a fraction of a second.

youdao

无家可归夺走了我所有的物质财富，把我撕扯得一丝不挂，在没写完的书中，最后给我剩了一页空白页。

Homelessness had taken every material thing from me and left me torn bare, an empty page at the end of a partly written book.

youdao

All right. The other thing I have to teach you is matter-energy interaction so that we can see how the Balmer series validates the Bohr model.

好的，我要教你们的里一个知识点是,物质能量的相互作用，我们可以见证,巴尔末线系是怎样证实波尔模型的。

麻省理工公开课 - 固态化学导论课程节选

So, that's the first point: It's material. The second point is that narrative has a form, and that it can be constructed, built.

这就是我第一个观点：它是物质的，第二个理由是,叙述故事有一个框架，它可以像一个手工品一样。

耶鲁公开课 - 1945年后的美国小说课程节选

As I said, it's a particularly hazardous substance, this is worked with in fume hoods.

就像我说过的，这是特别有害的物质，在通风柜中才能用。

麻省理工公开课 - 化学原理课程节选