Let's look at the energetics of one of those electrons crashing into a hydrogen atom inside the gas tube.
我们一起来考察一下,其中的一个电子的能量,在阴极射线管中,撞击到氢原子上。
OK, and you can see that this thing ought to unwrap, it's going to keep extending out those multiplications until gets down to the base case, going to collapse them all together.
好,你可以看到这种方法,是怎么解决的,他一层层的将乘法展开一直到最底层,然后将他们一起乘起来。
So spend 10 or 15 minutes thinking about this and write it down and bring your responses to class in the next period and we'll talk about that.
花十到十五分钟考虑这个问题,并把答案写下来,将你们的答案带到下次课堂上,我们一起来讨论
In that case point p 1 doesn't correspond to this point, it actually corresponds to the point of radius 2 and angle 1, which is about here.
基本上也就是说这是第一个点1,这是第二个点,把它们的值加到一起,然后我就得到了目标点,好,这听起来挺不错的。
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