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've asked several questions, and they are all good ones.' s take them one at a time.
你问了好几个问题,也都是好问题。让我一一来回答。
Let me make sure that the user annotations are disabled this time and let's take a little look at this one here.
我先把用户信息注释去掉,然后开始播放。
Then, to find the meaning of b, we take one derivative of this, dx/dt, that's velocity as a function of time, and if you took the derivative of this guy, you will find as at+b. That's the velocity of the object.
接下来,为了弄清b的含义,我们取它的一阶导数,dx/dt,得到速度作为时间的函数,如果你对它求导的话,你会得到at+b,这就是物体的速度
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