OK, so it's time to stop, I did, in fact, get caught up.
好,时间要到了,我最终还是讲完了。
And so, I ended up using it, and it's caught on.
所以我也开始用,而且已经上瘾了。
So, when I threw that thing up and you caught it, what you are doing mentally was immediately figuring out where it started and at what speed.
所以当你接住我抛出的物体时,你大脑里的反应就是,立刻弄清它的初位置以及初速度
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