If one of your goals is to lose weight, you will also need to change how and what you eat.

VOA: special.2010.06.08

If they're not obvious to you what they're called, you need to just study them and learn them.

如果它们不想它们的名字那么显而易见，你们需要学习它们记住它们。

麻省理工公开课 - 化学原理课程节选

So if you want to do well in 1504-- you'll know what you need to do, right?

如果各位想学好1504这门课-,你们知道该怎么做了，是吗？

哈佛公开课 - 幸福课课程节选

That's what you need to know if you're going to do life insurance.

如果你想从事人寿保险,你必须对它有所了解

耶鲁公开课 - 金融市场课程节选

What this means is that if you miss a class you need to get notes, and so you should get them from a friend or from the person sitting next to you.

这也就意味着,如果你落下了一节课,你就要看笔记,你可以向朋友或者身边的同学借来看

耶鲁公开课 - 心理学导论课程节选

Computing square root. I'm going to capture it in a piece of code, I'm going to be able to refer to it by a name, and I'm going to suppress the details, meaning inside of that computation, you don't need to know what it does. You just need to know, if I give it the right kind of input, it'll give me back an input that satisfies the contract that I set up.

比如计算平方根,我会用一段代码来说明,我将给它命名,并且忽略细节,意思就是在这一段计算过程中,你不用知道它做了什么，你只需知道，如果我进行了正确的输入,它将会给我符合条件的输出。

麻省理工公开课 - 计算机科学及编程导论课程节选

As shown in this cartoon here, again you don't need to know the details of this, but if you're interested in knowing what's the biological bases of the genetic code this is it.

像这个动画里画的那样,这里你也不需要了解细节,不过如果你很有兴趣想知道,遗传密码的生物学基础

耶鲁公开课 - 生物医学工程探索课程节选

So it does that for us so that you can get away with just knowing the address of the first byte and it will make sure that you know when to stop by including the special value so, in fact, get the string if you type in a three-letter word, we allocate four bytes no matter what because we need an additional byte 0 for this special sentinel value back slash zero at the very end.

它为我们做了这些事情，这样我们就可以,通过第一个字节的地址,它还可以通过包含一个特殊的值,来保证在哪里停止，如果你输入了一个三个字母的单词,就可以获得那个字符串，不管怎样，我们分配四个字节,因为我们在末端需要一个额外的字节,来保存这个特殊的标志值--反斜杠。

哈佛公开课 - 计算机科学课程节选

z And what you need to remember is if the z 8 is equal to eight or greater, such as oxygen being the cut-off point, this sigma 2 p orbital is actually lower in energy than the pi 2 p orbitals, the molecular orbitals.

你们要记住如果,等于或者大于，就像O是分界点，这时sigma2p轨道,比π2p轨道能量更低。

麻省理工公开课 - 化学原理课程节选

So it turns out there's a solution to this: If you need more precision, more digits after the decimal point than a float allows, what do you go for instead?

所以这里有一个解决方案：,如果你需要比float类型允许的更高精度，小数点后更多位数,那你该用什么取代它？

哈佛公开课 - 计算机科学课程节选

If you need help, ask John, myself, or the TAs. That's what we're here for.

如果你需要帮助，请教John，我自己，或者助教们，那是我们存在的理由。

麻省理工公开课 - 计算机科学及编程导论课程节选