A covalent bond is any time we have a pair of electrons that is shared between two different atoms.

所谓共价键就是我们有两个原子,共用一对电子。

麻省理工公开课 - 化学原理课程节选

and they bought every single one of these guests a pair of new shoes for a party favor.

而且他们给每个参加聚会的人买了一双新鞋。

富家孩子的生日 - SpeakingMax英语口语达人

If these bonds were all completely of equal distance apart, whether is was a lone pair or bonding electrons, 5° the angles would be 109 . 5 degrees.

如果不管它是孤对，还是成键，它们等距分开的话，键角是109。

麻省理工公开课 - 化学原理课程节选

We have a piston. We have a pair of stops.

这有一个活塞，两个挡板。

麻省理工公开课 - 热力学与动力学课程节选

You can't compare a pair of shoes with the child's life."

你不能拿一双鞋子和一个小孩的生命比较“

普林斯顿公开课 - 人性课程节选

Actually, the view of vectors we take nowadays is that vectors are associated with a pair of numbers which, on the rotation of axes, transform like this.

实际上,今天我们讲矢量所用的观点是,矢量是和一组坐标值相对应的,在坐标轴旋转的过程中像这样变换

耶鲁公开课 - 基础物理课程节选

The green block is gonna become a pair of parentheses.

只需要把绿色版块换成一对圆括号就可以了。

哈佛公开课 - 计算机科学课程节选

I'll mention,just in passing, that these thought experiments that I'm about to give, Bernard Williams I'm going to give a pair of them,come from Bernard Williams, who's a British philosopher.

顺便一提，我即将做的两个思考实验，是源于，一位英国哲学家。

耶鲁公开课 - 死亡课程节选

A little while ago there was a sniper, actually a pair of snipers killing people in Washington and the one thing everybody knew about it was there was a white van involved.

几年前出现了一个狙击手，确切地说，是一对狙手在华盛顿作案,大家都知道的一件事是,作案过程中有一辆白色小货车。

耶鲁公开课 - 心理学导论课程节选

When you add this whole thing up, -411kJ/mol it gives you a net of minus 411 kilojoules per mole or about 4 eV per ion pair.

当你全部加上时，得到净能量,或者是4eV每个离子对。

麻省理工公开课 - 固态化学导论课程节选

to make sure that it's going to be a comfortable pair of shoes that last me a long time.

来保证这双鞋很舒服而且可以穿很久。

不需要名牌 - SpeakingMax英语口语达人

OK, so what have I done? I just added a little bit more now. I'm now running through a pair of loops. Again notice the encapsulation, that nice abstraction going on, which is what I want. Once I get to this stage though by the way, there might be more than one solution.

我现在运行了一对循环,再一次注意这个封装,抽象得很好，这就是我想要的结果,我按这种方式走到这一步的时候,可能会有多组答案。

麻省理工公开课 - 计算机科学及编程导论课程节选

Yeah, definitely, a nice pair of shoes and then kind of take it from there.

绝对地，一双漂亮的鞋子，你可以从那方面入手。

想成为引领时尚的人 - SpeakingMax英语口语达人

This label is DNA that might be made radioactive or made fluorescent, and it has a base pair sequence that is from some other region of the gene that you're interested in.

这种标签就是具有放射性,或者荧光性的DNA,它有一个取自于,你感兴趣的那段基因上,其他位置的碱基对序列

耶鲁公开课 - 生物医学工程探索课程节选

Suppose I get an A and my pair gets a C, then sure I get that initial payoff of 3, but unfortunately I can't sleep at night because I'm feeling so guilty.

假如我得到A我对手得C,没错我开始得到3单位效用,但我感到愧疚,我因良心受到谴责

耶鲁公开课 - 博弈论课程节选

As you would say, it's like pair of skinny jeans, a pair of brogues, I don't know, a T-shirt,

这打扮就是一条紧身牛仔裤，一双皮鞋，大概还有一件T恤，

街头时尚的精髓 - SpeakingMax英语口语达人

So in terms of nitrogen that starts off with a valence number of 5, again we have 2 lone pair electrons in the nitrogen, and again, we have 6 electrons that are shared.

对于氮来说,我们应该从五个价电子开始，同样，氮也有两个孤对电子，共用电子的个数也一样，是六个。

麻省理工公开课 - 化学原理课程节选