贵州师范大学 » guizhou Normal University 都在做什么呢,现在 » So what all do now 我不知道怎样使用标点符号 » I do not know how to use punctuation marks ..
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PROFESSOR: All right. Good. So we can fully believe what our calculations were now, which is a nice thing to do.
教授:好了,我们现在可以,完全相信我们的计算结果了,多么美妙的一件事。
And so all we have to do now is to calculate the moment of inertia of the system, and then we can predict what the period — of this pendulum is going to be — which is not my goal.
所以我们现在要做的,是算出这个系统里的转动惯量,然后就可以预测出,这个摆的周期是多少-,这并不是我的目的。
I have here that same ladder, and now what I will do is I will set the angle alpha not exactly at the critical point but a little lower, so that when I let it go, we'll all see that it will slide.
这是一个梯子,现在我要,使得角度α,不是恰等于临界点,而是略小一些,所以当我放手,我们会看到它下滑。
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