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"One of the absolutely key, most important variables as to whether or not a forest survives and continues is whether local people monitor each other and its use.
VOA: special.2009.10.16
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So what they do is, they're describing how these thermodynamic properties change, in terms of only state functions and state variables.
他们的作用是描述,随着状态函数和状态变量的变化，系统的热力性质如何变化。
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So, these on-changing properties that describe the state of the equilibrium state of the system are called state variables.
这些描述,系统平衡态的,变化的属性,就叫做状态变量。
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OK. So if we have variables, one of the questions we can ask is, what's the type of the variable.
好，如果我们有了一个变量，我们要问的问题之一就是，这个变量的类型是什么？
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That's not just a set of functions--variables, as one might say in the lab.It's produced by genius.
它不仅仅只是一套机器，像人们在实验室所见的一样多变，它是由天才创作的。
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I've decided that I need to be able, in my program, to swap the value of two variables. All right.
我觉定在我的程序中，我可以，交换两个变量值，好的。
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The Taylor rule specifies specific variables and everybody at the markets would understand the rule, ? and that's correct, right?
像泰勒规则就明确了具体的变量,市场中每一个参与者也都能够理解，这个没错吧？
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This refers to random variables that have fat-tailed distributions-- random variables that occasionally give you really big outcomes.
这就表示,服从长尾分布的随机变量,这些数据出现极端值的概率比较大
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So similarly, as we now move up only one more atom in the table, 3 so to an atomic number of three or lithium, now we're going from six variables all the way to nine variables.
类似地就像我们现在,移动到周期表中仅仅多一个电子的情况，移动到一个原子数为，或者锂元素,现在我们从6个变量到了9个变量。
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There may be other variables at play but, all things being equal, similarity does not breed contempt.
可能有其他因素发挥作用,但是，如果所有因素都一样，如果两个人相似，就不会轻视对方。
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You will never hear him speaking in terms of dependent or independent variables.
你会听到他说及从属,或独立变量之类的词汇。
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OK. Now, last thing about variables, and then we're going to start pushing on this, is where can you use them?
好，关于变量的最后一件事，然后我们就要，结束这个话题了，这个问题就是在什么地方可以应用变量？
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On the other hand, temperature, volume and pressure are variables that are much easier in the lab to keep constant.
另一方面，温度，体积和压强,在实验室中比较容易保持恒定。
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You don't have to mention any of the local variables, because at this point in the story, they're just not relevant.
你不需要提及任何一个局部变量，因为在这个地方，它们是不相关的。
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I've got some internal variables I have to store, what kinds of things do I have to keep track of?
计算的时候需要占用多少内存,我需要存储一些内部变量,我需要记录哪些东西呢？
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So the state variables describe the equilibrium's state and they don't care about how this state got to where it is.
状态变量,描述平衡态，它们并不关心,系统是如何演化成这样的。
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It turns out that slightly before the stack, slightly before this conceptual chunk of memory, there's other things called environment variables that we may see over time but elsewhere in memory are other things.
结果是稍微在堆之前，稍微在这个内存块概念之前，另外还一个东西叫做环境变量,我们之后可能看到，内存中的其他地方,是其他的东西。
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So when I do the analysis, I want to think about what am I doing here, am I capturing all the pieces of it? Here, the two variables that matter are what's the length of the list, and how many times I'm going to search it?
这里，要关注的,两个变量是列表,的长度以及我要搜索的次数,这种情况下，这个算法赢了？
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The big three are three variables that the effects are so powerful that they almost don't need to be discussed in much detail.
是指三大因素,力量很强悍,我们几乎不用说得太细。
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We have instead what's called a probability density when we have continuous random variables.
所以我们用概率密度的概念来描述,连续型随机变量的情况
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If you think about what happens when we go from hydrogen to helium, now instead of one electron, we have to describe two electrons, so now we have six position variables that we need to plug into our Schrodinger equation.
如果你们考虑,当我们从氢到氦会发生些什么，现在我们不是要描述一个电子，我们将要描述两个电子，所有我们现在将有6个位置变量,需要加入至薛定谔方程。
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We often assume in finance that random variables, such as returns,are normally distributed.
金融学中我们常假设随机变量,例如收益率,是服从正态分布的
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This is going to be a function, I only need two variables, and here I've got three variables down.
我们只，需要两个变量，而现在这里有三个变量。
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We'll actually see it's a wonderful way of effectively looping yourself back around, for instance if you're at the end of the alphabet So what about those variables?
如果我们要将某些东西首尾连在一起,在这个圈里循环，你就会看到它的奇妙之处了，譬如,你在字母表末,好，我么继续，这些变量都是些什么？
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Now, this is still a little bit cumbersome, in part because of the variables involved, S including S.
但是这个方法还是有一些笨拙，部分是因为所涉及的变量，包括。
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It turns out that when you're talking about macroscopic properties of matter, you don't need very many variables to describe the system completely thermodynamically.
实际上,当你谈及物质的宏观性质时，你并不需要很多变量才能从热力学上,完整地描述这个系统，’
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T p V I've got three variables, T, p and V.
一共有三个变量：
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And so we saw that as well, the last piece we had here is the ability to create variables, which have their own values, and that's done using an assignment statement.
我们也可以看到，这里我们最后的是,创建了一些变量，这些变量都有自己的值，这是运用了赋值声明来完成的。
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Not one of these variables. And we can calculate that.
所有的这些变量都我们能够计算的。
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Covariance is a measure of how much two variables move together.
协方差衡量的是两个变量一起变动的情况
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