Well, you can implement this in a few different ways but here's one approach that uses some int counter=0 of the syntax we just looked at, int counter equals 0.

当然，你可以有好几种方法来实现这一目标,但是其中一种方法,只需要用到我们刚刚看到的那种语法。

哈佛公开课 - 计算机科学课程节选

And the answer is, you can use a variable anywhere you can use the value.

答案是，在需要用到值的,任何地方都可以使用变量。

麻省理工公开课 - 计算机科学及编程导论课程节选

So, they would have been more vulnerable and you wouldn't have to have such a powerful bow.

所以,既然普通弓箭容易造成受伤,你就不会需要用到那么强力的弓

耶鲁公开课 - 古希腊历史简介课程节选

That's what we have to know to compute the efficient portfolio frontier with three assets.

这些都是计算三种资产的有效边界,所需要用到的。

耶鲁公开课 - 金融市场课程节选

And we won't just use them in this class.

而且我们不只是在课堂上才需要用到它们。

麻省理工公开课 - 化学原理课程节选

Then we have to steal the code from earlier to do a forever loop, a while true loop and then I'm gonna go ahead and use that printf thing that we saw.

然后再借用先前的代码,做一个永久性的循环，即while循环,紧接着需要用到一个,之前我们看到过的printf函数。

哈佛公开课 - 计算机科学课程节选

Another way of saying it is, anything that uses get float doesn't care what the details are inside or shouldn't, and if I change that definition, I don't have to change anything elsewhere in my code, whereas if I just have the raw code in there, I have to go off and do it.

换种说法就是，任何用到获取,输入这个功能的人不用担心具体的实现细节,如果我改变了这里的实现，我并不需要去改变我的代码,因为我的最底处的源码就在这里,我去改这里就可以了。

麻省理工公开课 - 计算机科学及编程导论课程节选

So if we consider lithium, potassium, and sodium, they're all together in the same group on the periodic table, knowing what we do about biology we can immediately think of sodium and potassium, or even just knowing what you know about table salt, for example, that these are two elements that we find, and particularly in the ion form in very high concentrations in our body.

我们来考虑一下锂，钾和钠，它们都在周期表中的同一族里，想要知道我们将元素周期律,用到生物学会怎么样，我们首先想到的就是钠和钾，甚至只需要知道食盐，我们发现它们是以很高浓度的离子形式,存在于我们体内的两种元素。

麻省理工公开课 - 化学原理课程节选

So if you're working with cyanide in the lab as potassium cyanide or sodium cyanide, those are what are called p h s's, it's a rating for different kinds of chemicals.

因此如果你在实验室中,需要用到氰化物，比如氰化钾或者氰化钠，这就是所谓的，“P，H，S“,这是化学药品有害程度的一个级别。

麻省理工公开课 - 化学原理课程节选

So what we need to do here is use the Rydberg formula, and actually you'll be given the Rydberg formulas in both forms, both or absorption and emission on the exams.

我们需要用到Rydberg公式，事实上，在考试时,我们会给你们Rydberg公式的两种形式。

麻省理工公开课 - 化学原理课程节选