这台机器自动循环运动。
这物体已不再循环运动。
水永无休止地在海洋、空气和陆地之间这样循环运动。
Water moves endlessly among sea, air and land in this circulation .
It looks like a tautology because you're never able to show me something that moves forever at a constant velocity, because every time you don't find such a thing, I give an excuse, namely, a force is acting.
这听上去像个死循环,因为你不可能,找到永远匀速运动下去的物体,因为每当你找不到这样的物体时,我就会给出一个理由,也就是,有力作用在上面
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