if you don't want to use that, you can also derive it as we did every time, it should intuitively make sense how we got there. But the exams are pretty short, so we don't want you doing that every time, so we'll save the 2 minutes and give you the equations directly, but it's still important to know how to use them.

吸收的和发射的，如果你不想用公式,你也可以每次都向我们这样推导它,很直观的就能得到结果，但考试时间很短，我们不希望你们每次都推导,所以我们会直告诉你，让你节省2分钟，但知道如何应用它十分重要。

麻省理工公开课 - 化学原理课程节选

You don't have to understand every little thing all the time, you know.

你不需要一直都能理解所有的东西。

要想成为读书达人 - SpeakingMax英语口语达人

So before long, we'll see, especially for problems that we can't allocate an int every time we want to store something, because what if we want to store 140,000 English words.

所以不久后，我们将看到，特别是对于,我们不能为int分配内存，每次我们想要,存储一些东西时，因为当我们想要,存储140，000个英语单词时。

哈佛公开课 - 计算机科学课程节选

We don't know what it's like to be dead, because every time we try to imagine it, we fail.

我们不知道死亡是什么样的，因为每次我们想象死亡，都无果而终。

耶鲁公开课 - 死亡课程节选

But you don't want to have to run it a long time, every time you have a hypothesis.

但是你不必每次有一个假设，都要去运行很长时间。

麻省理工公开课 - 计算机科学及编程导论课程节选

That's why every-- development of every specific vaccine turns out to be different because they don't all follow exactly this kind of time course.

这就是为什么,每一种疫苗的发展都是不同的,因为疫苗诱导产生应答所需时间各不相同

耶鲁公开课 - 生物医学工程探索课程节选

Every time you do the experiment T in equilibrium with the heat bath at T, v2 you'll get the same p2 and V2.

与热库相接触的每次实验中,达到热平衡后的温度都是，压强都是p2，体积都是。

麻省理工公开课 - 热力学与动力学课程节选

It looks like a tautology because you're never able to show me something that moves forever at a constant velocity, because every time you don't find such a thing, I give an excuse, namely, a force is acting.

这听上去像个死循环,因为你不可能,找到永远匀速运动下去的物体,因为每当你找不到这样的物体时,我就会给出一个理由,也就是,有力作用在上面

耶鲁公开课 - 基础物理课程节选

Because if anything worked, there would be a solution that would have some value over time and people wouldn't have to be seeking out the newest miracle, getting every little thing they see on TV and the like, and I'll show you some amusing examples of those in the next class.

如果真有用,那就找到了长期有效的解决方法,人们就不会再三地寻找方法了,只要看到电视上有什么小妙招就要尝试,下堂课我会举几个有趣的例子

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

And I have to admit, I did the standard thing you do every time you run across something you don't know about, you go to Wikipedia.

额外的名为self的变量，那么什么是self呢？,我需要承认，我做了大家当碰到，不会的问题都会做的标准的事情。

麻省理工公开课 - 计算机科学及编程导论课程节选

But wouldn't it be nice to just have a certain period of time every day when you didn't have to even have it be ? so much as a remote possibility?

但要是每天能有一段特定的时间,死亡对你来说,甚至连一个遥远的可能性都不是,那岂不是很好？

耶鲁公开课 - 死亡课程节选

if I say a particle's location is i times t^2 plus j times 9t^3, for every value of time, you can put the numbers in and you can find the velocity by just taking derivatives.

一个质点的位置,i ? t^2 + j ? 9t^3,在每一个时间点,你可以把数值代入,并通过求导得到速度

耶鲁公开课 - 基础物理课程节选