translation.en: Now, the machine is -- in this case, it's a real approximation of that, because obviously you can't move physical matter infinitely with infinite speed and have it stop instantaneously.
translation.zh: 所以，这个机器 -- 从这个角度来讲，是这种想法的近似表达 因为很显然你不能够赋予现实中的物体 以无穷的速度并且使它瞬间停止