凯恩说：“我们是第一个养殖这种蜂的人，也是第一个提供红莓和黑莓传粉昆虫可能性证据的人。”

"We're the first to cultivate this bee and the first to provide as much evidence of its potential as red raspberry and blackberry pollinator, " says Cane.

youdao

我们星期二的第一节课是法语。

Our first lesson on Tuesdays is French.

《牛津词典》

旅行的第一段我们乘的是火车。

We did the first stage of the trip by train.

《牛津词典》

And specifically, when we talk about ionization energy, it's assumed that what we mean is actually the first ionization energy.

特别地，当我们讨论电离能的时候，我们默认,这指的是第一电离能。

麻省理工公开课 - 化学原理课程节选

Now the first passage is in Gadamer's text on page 735, the very bottom of the page, and then I'll be going over to page 736.

现在我们要看的第一篇文章是伽达默尔写的,在第735页最下面，一直到736页。

耶鲁公开课 - 文学理论导论课程节选

So, if we want to think about what the first ionization energy is of boron, what you want to do is write out the electron configuration, because then you can think about where it is that the electron's coming out of.

如果我们要考虑,硼的第一电离能，你首先要做的是写出它的电子排布，因为在这之后,你才能知道拿走的是哪里的电子。

麻省理工公开课 - 化学原理课程节选