... what I feel我感觉, now there is no throughout我们还没有穿越彼此 Come on let's dance now,来吧,让我们跳个舞 ...
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Now, when you look at this there is something quite remarkable and the remarkable thing x - throughout this whole trajectory-- if there is no air draft, - if there is no friction-- is not changing.
你们可以看到,有件事非常值得注意,可以注意到,方向的速度,is,that,the,velocity,in,the,x,direction,在整个轨迹当中-,如果没有空气阻力,也没有摩擦力-,是不会改变的。
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