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is going to be just the opposite of 2px So if you said 2 p x the first time, 2py say 2 p y this time.
就和，我们开始说的那个,如果你第一次说，现在就是。
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Not to harp on the mathematical features of this, but cubing, AX*X*X you know, if you're starting to do AX star, X star, X, every time you want to cube some value in a program, it just feels like this is going to get a little messy looking, if nothing else.
不要总是说这个的数学特性，但是体积，你们懂的，如果你开始做，在一个程序中，每次你想算几个数值的体积，感觉它就变得,有一点凌乱的，如果没有其他的。
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For example, if you started here and you did all this and you came back here, the average velocity would be zero, because you start and end at the same value of x, you get something; 0 divided by time will still be 0.
例如,如果你从这里开始运动,经过这个过程又回到这里,平均速度就是0,因为初态和末态的位移相同,你得到了什么呢,0除以时间还是0
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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。
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And the pi star orbitals result from any time you have destructive py interference from 2 p orbitals that are either the p x or the p y.
星轨道是由于2p轨道的相消干涉,不管是px还是。
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If they tend to move together, when x is high and y is high together at the same time, then the covariance will tend to be a positive number.
如果x和y同向变动,当x值和y值同时都很大,协方差的结果将会是一个正值
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Let's create a graph here that on the x axis it's going to be time, so time zero will be when you first take in a food and then one hour later, two hours later will be shown as you go from left to right, and then we'll have blood glucose level up on the y axis.
我们在这建立一个曲线图,X轴代表的是时间,所以零时间点是你第一次进食的时间,然后一小时以后,两小时以后,是从左到右呈现在图表上的,在Y轴上是你的血糖值
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Then go to the x equation and demand that this be equal to the desired x value and find the time.
然后列出关于 x 的方程,令这个式子等于给定的 x,并求出时间
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y A square it's called X, another square it's called y and now this time I'm doing pointers to int not points to char.
一个叫做x，另外一个叫做,这一次是int型指针,不是char型指针。
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So, in the language of calculus, x is a function of time and this is a particular function.
所以,从微积分的角度来看,x是一个关于时间的函数,而且是个很特殊的函数
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People have been working with x-rays for about 30 years by this time.
到现在为止,人类和X射线打交道大约30年了。
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0 This time I called it X. I hard-coded into it the value 10.
这一次我声明它为X，我把它赋值为。
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You'll put time t=0, x doesn't have this term, doesn't have this term, and it is c.
你令时间t=0,这一项就消失了,这一项也是,只剩下常数c
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So what I've said so far is, a particle moving in time from point to point can be represented by a graph, x versus t.
到目前为止,我说过,一个质点随时间的连续运动,可以用一幅x-t图来表示
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It's got components which are x and y that could vary with time.
它有两个分量,x 和 y,二者都随时间变化
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This is not an x versus time plot or y versus time.
这不是 x 坐标关于时间的图像,或 y 坐标关于时间图像
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x and y are dependent on time.
和 y 坐标都是时间的函数
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Initially, its location as a function of time is equal to i times x plus j times y.
初始时刻,它的位移作为时间的函数等于,i ? x + j ? y
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And now we get the p orbitals, remember we want to fill up 1 orbital at a time before we double up, so we'll put one in the 2 p x, then one in the 2 p z, and then one in the 2 p y.
我们到了p轨道，记住在双倍填充之前,我们想要每次填充至一个轨道，所以我们在2px填充一个然后2pz填充一个，然后2py填充一个。
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At that time t, the x coordinate must have a certain value.
在该时刻,x 坐标一定是个确定的值
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At every instant, it's got a location given by the vector R; R itself is contained in a pair of numbers, x and y, and they vary with time.
在每一个瞬时,它的位置由位矢 R 给出,R 本身包含了一对坐标值 x 和 y,并且它们都随着时间的变化而变化
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