So what are the net forces in the x direction?

所以x方向上的合力是多少？

It's not accelerating in the x direction, nor is it accelerating in the vertical direction or the y direction.

没有向x方向加速没有向竖直方向 就是y方向加速。

The unit vector in the X direction.

X方向上的单位向量。

One in the x direction, left or right.

一个在 x 方向，左边或右边。

Alright, the net force in the x direction.

好的， x 方向的合力。

So, the acceleration in the x direction is gonna be what?

那么， x 方向的加速度会是多少？

And then for the other electron that's maybe in the x direction, you make a bunch of observations.

然后对于可能在 x 方向上的另一个电子，你进行了一系列观察。

Using the right hand rule, their cross products should point in the negative X direction, so the cross product of these two vectors is negative four times.

用右手定则 它们的叉乘应该指向-X方向 所以这两个向量的叉乘是-4倍。

Then the term A tells you how much I had is stretched in the X direction, and the term D tells you how much J hat is stretched in the wide direction.

A项告诉你在X方向上拉伸了多少 D项告诉你在宽方向上拉伸了多少J帽。