When I call this class definition, it calls init, init and I give it an x and a y value.
我说过,当我们,调用这个类的定义的时候,它会去调用。
Then you have history of Lenox Avenue, Malcolm X Boulevard, which is a part of Harlem.
然后,你还会看到莱诺克斯大道和马尔科姆X大道的历史,它们都是哈莱姆的一部分。
x It says, take the name x and create a binding for that name to the value of the sub-expression and in fact to do this, to stress a point, let's do that.
它的意思是,创建了一个名字,然后创建了对于这个名字,和子表达式的值的绑定,实际上这么做,我们是为了,要强调一个点,让我们来说说这个点。
And you can very quickly take this feature to an extreme 10 and start putting X and Y and A and B and 10 and all your variables up top because it would seem to solve all of your problems and stop all of your thinking, but it's generally not a good thing.
你可能迅速地使这个特征成为一个极端,开始把X和Y和A和B和0,和所有的变量都放在最前,因为好像它可以,解决你的所有问题,并中止你的想法,但通常这不是一件好事情。
You can either think of it as an arrow and imagine the arrow, or you can reduce it to a pair of numbers, x and y.
你既可以用有向线段来表示,也可以用一组数字来表示,x 和 y
So they're the same shape, this is the shape of the orbital or the shape of the wave function, and we can call this either 2 p x a being combined with 2 p x b, or we could say since it's the same shape, it's 2 p y a being combined with 2 p y b.
它们形状是一样的,这是轨道的形状或者波函数的形状,我们叫它2pxa和2pxb结合,或者我们说因为它们的形状是一样的,它是2pya和2pyb结合。
So we're talking about an experiment when you generate-- Each experiment generates both an x and a y observation and we know when x is high, y also tends to be high, or whether it's the other way around.
这里说的是由试验产生的,每一次试验可以获得一组x与y的观察值,当x值大的时候,y值可能也大,或者相反
How would we go about, I mean I don't want to do it because I'll probably get it wrong, but if I wanted to solve out for this X and the Y, since this is a QR class, let's just talk about it a second.
我们怎么解呢,我的意思是我现在不会去计算,因为我可能会算错,但是如果你真的很想解出X和Y的值,介于这是一节需要快速反应的课,那我们花些时间来探讨一下吧
Some others If I might have a right to X, do you have a duty to fulfill that for me?
其他的像如果我有某项权利,你有没有义务帮我实现?
Well, we want to know, after 2041, let's say 2045, is there somebody who's a person, call him Mr. X.
我们想知道,2041年后,假设是2045年吧,会不会存在一个人,我们称他为X先生。
And the mathematics of that equation involved a double derivative in time of x 0 plus some constant times x equals zero with some constraints on it.
那个数学方程式,包括了x对时间的二阶导数,加上常数乘以x等于,还有一些限制条件。
Then, in the last book of the Republic, Book X, there is, once again, a descent to the underworld, to the world of Hades.
接着,在《理想国》的最后一部,第,X,部,再度下降到阴间,地狱的世界。
See, I've defined f of x to be a function x=x+1 that takes a value of x in, changes x to x+1, x and then just returns the value.
我定义了f是一个函数,输入x,让,然后输出。
And I've got to worry about, is somebody else using ANS, answer, as a variable, in which case I've got to be really careful. Is somebody else using x as a variable? I've got to deal with a lot of those details.
而且我还要担心有没有别人,使用了ANS,answer作为变量,这样我就必须要非常小心,有没有别人用x当做变量呢?,我需要处理很多类似的细节。
Well, it looks like I just stole my own implementation Y but I happen to call it A and B, instead of X and Y, and so here, what's going on?
嗯,看起来我刚好像盗用了我自己的实现,我碰巧叫它为A和B,代替X和,这里,发生了什么事?
Quite often, it's natural to pick x and y in a certain way, because starting a projectile near the Earth, it makes sense to pick the horizontal as x and vertical as y.
我们经常会很自然地选取 x 轴和 y 轴,因为如果在地表附近做抛物运动,我们通常以水平方向为 x 轴,竖直方向为 y 轴
So we can have, if we have the final quantum number m equal plus 1 or minus 1, we're dealing with a p x or a p y orbital.
所以如果我们有,磁量子数m等于正负1,我们讨论的就是px或者py轨道。
Another way to represent a point in a plane is I've got a radius and I've got an angle from the x-axis, right, and that's a standard thing you might do.
平面上面的点的方法,也就是极坐标,上面那种方法其实是,如果你们喜欢我这么说的话,笛卡尔坐标表示法。
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