So let's do a quick clicker question, and you tell me how many valence electrons does fluorine have? Remember, valence electrons are different from core, they're only the outer-most electrons in the outer-most shell.

那么让我们来做一个小选择题，请大家来告诉我,氟有多少个价电子，要记得，价电子与芯电子不同，它们是在最外壳层的最靠外面的电子。

麻省理工公开课 - 化学原理课程节选

and it's been a really rewarding experience and I'm glad that it's something that I've done.

有了一段富有成效的经历。我很高兴我选择了这份工作。

I've been 实战 - SpeakingMax英语口语达人

OK. The other piece I want to say about variable names is, once I have that choice of variable name, I can use it, but in fact there are a few things that I can't use in terms of variable names.

关于变量名字我还想说的,另外一点就是，一旦我对变量的名称可以选择，我可以用自己的方式命名，但是,有一些词汇是,不能用来命名变量的。

麻省理工公开课 - 计算机科学及编程导论课程节选

If you want to get some input from the user, my God I don't want to have to program it to low level zero and 1 just to get keys from the keyboard; please let there have been someone who does that for me and indeed there are an increasingly sophisticated options that you can pull off the shelf.

如果你想获得一些用户的输入数据，我的上帝,我可不希望在键盘上敲入0，1的低水平方式来编程;,希望有个人能帮我做这件事吧,但是现有的选择,也变得日益复杂了。

哈佛公开课 - 计算机科学课程节选

As I say, there's a certain instability which could never apply in the semiotics of the stoplight because there it's not so much a question of but rather the insistence that the color is just that color.

我承认，颜色的选择有时候是有规律的,但是在语义学上这解释不通,因为他们不考虑,但是语义学家认为颜色只单纯表示颜色。

耶鲁公开课 - 文学理论导论课程节选

I've already told you the story about Achilles having the choice of living forever without fame or dying with fame, and he makes the choice for death and fame.

我已经跟你们说了阿喀琉斯的故事,他有两个选择,或是无名无望的活下去,或是战死沙场,但受万世颂扬,他选择了死和名望

耶鲁公开课 - 古希腊历史简介课程节选

I think it's whether or not the prisoner's cooperate in the sentence they have, and if they kind of rat out the other person, then they can have less; but if both rat out, then they like end up losing large scale.

我记得是,两个囚犯面对审判的时候有如下选择,如果他们中有人供出了对方,他它会减刑,要是他们都供出了对方就要受重刑

耶鲁公开课 - 博弈论课程节选

I just think it's good to have a lot of choices for the student body.

我觉得，让学生们有更多可选择的食物是件好事。

有机农庭院 - SpeakingMax英语口语达人

And I picked looking at methane so we could see if there are other factors that we're not considering, that we need to maybe tweak our model a little bit, and I think we'll find that we do if we take a look at a polyatomic molecule, methane, CH4 so c h 4.

我选择甲烷这个例子，我们可以看到,如果有一些我们没有考虑到的因素，我们需要修改一下我们的模型，我们看一看,甲烷CH4这个多原子分子，就会知道这一点，甲烷。

麻省理工公开课 - 化学原理课程节选