当一个来自像越南这样温暖的国家的学生在秋天第一次到加拿大时，他首先感觉到寒冷。

When a student from a warm country like Vietnam comes to Canada in the autumn for the first time, he feels cold at first.

youdao

我会首先祝贺你踏出了学习语言的第一步。

I would, first of all, congratulate you on taking the first step of starting to learn that language.

youdao

我首先迈出第一步很有效，但是事先，我得打下许多基础，以帮助我迈出那一步稍微容易一些。

It worked out well, by making my first move, but there was a lot of groundwork to be put down beforehand that helped me make that move a little bit easier.

youdao

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

Because it came from optics, you know, rays of sunlight and so on And in fact, even when we first started pulling synthetic fiber, the first synthetic fiber cellulose was referred to as ray on, because it looked like a ray that was being pulled.

因为它源自光学，比如太阳光线等等,实际上，及时当我们首先开始抽出,人造纤维，第一根人造纤维的纤维素,叫做光线，因为那条在被抽出的纤维素,看起来像是一道光线。

麻省理工公开课 - 固态化学导论课程节选

OK? And in fact, if you look at the code up here, and it's on your handout, the very first one, x 1, right here- if I could ask you to look at it-- is a piece of code to do it. And I'm less interested in the code than how we're going to analyze it, but let's look at it for a second.

实际上，如果你看看,你们课堂发的材料上面的代码，第一页上的，就是那-,大家请看看实现的这一部分代码,我不太关心,我们会怎么解释这个代码,首先让我们先看看。

麻省理工公开课 - 计算机科学及编程导论课程节选