Instead, we have a certain energy, we have certain geometric constraints, we have a certain energy constraint and these fall out.
然而,我们有确定的能量,我们有某些几何约束,我们有某些能量约束。
And what he said was that when you get down to atomic length scales there are limits, there are constraints on our ability to observe.
讲的就是,当你去进入到原子长度的尺度中,我们的观察能力,有一定的限制条件。
It's a supposition that whatever the object of theory might be, - theory itself must-- owing to whatever intellectual constraints one can imagine-- be of such and such a form.
不管理论是关于什么事物的,它自己都只能-,由于人们思想的局限性-,以猜想的形式存在。
The constraint is the constraint of the experiment and the constraint of the experiment is that the enthalpy is constant. So the constraints we have here, is the constant enthalpy.
这个实验的限制,就是焓是常量,所以这里的限制是焓不变,我们考虑的这个过程。
And maybe you give it a set of constraints.
你可能给了它一系列的约束条件。
Now this is--;So, these are constraints on grammar and they're really interesting because they tell us what's a humanly natural language versus what's not a humanly natural language.
这些就是语法的不足,它们很有意思,因为它们可以告诉我们,什么是人类的自然语言,什么不是人类的自然语言
So with problems at zero, ; which will be posted in two forms; PDF PDF for standard and PDF for hacker on cs50.net tonight, you will have the choice of implementing pretty much any scratch projects you can think of, and which subject to very few constraints.
对于问题集,我们提供了;,标准PDF以及可编程,今晚它们都会被放在CS50,net上,你可以选择任何,你想到的项目,范围不限。
And, the equation is subject to these constraints.
然后,这个方程要遵循一些法则。
And so you've got this tension between what might be evolutionarily wired impulses and the kind of social constraints that say this isn't good, this isn't appropriate, this is taboo.
因此,两者之间有冲突,一方面,从进化论角度来看,你有这样的冲动,但是从社会建构的立场看,这不合适,是社会禁忌。
It expands. You change your constraints on your system, you heat it up some more, then you take the heat source away, and you put it back in contact with the atmosphere. And you cool it a little bit, change the constraints, cool it a little bit more, and heat, and you've got a closed cycle engine.
让它与大气接触冷却,改变约束,使它继续冷却,然后又再次加热,这就是循环热机,我们以前也研究过,更复杂的机器。
So this isn't the most useful form that we can have, but what we'll see shortly is that from this, we can then derive further criteria for essentially any set of variables or any set of external constraints, like constant temperature or pressure or volume and so forth that we might set.
所以这不是我们所能得到的最有用的形式,但是我们会很快看到,我们能够进一步推导出包含任意变量,或者任意约束的自发过程判断标准,比如说恒定的温度,压强,体积或者其他我们能够给出的约束。
And it tries to find the shortest way, subject to those constraints, to get from Point A to Point B. And there are many, many other instances of this kind of thing.
然后谷歌地图开始寻找,满足这些条件的从A地到B地最短路径,还有很多这样的例子,明天我们会再复习一遍这些内容。
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