The reason it looks like a tautology, because you look around, nothing seems to have its velocity forever.

其原因听起来像是绕圈子,因为你看看四周,似乎一切都不可能永远运动下去

耶鲁公开课 - 基础物理课程节选

What's important in My Fair Lady is to - repeat the repetitiousness of verse-- the rain in spain falls mainly on the plain -in terms of the tautology of the plot.

重要的是窈窕淑女中,这种韵律的加强-,“西班牙之雨大多洒落于平原之上“,韵律的反复加强了情节。

耶鲁公开课 - 文学理论导论课程节选

This is tautology.

这有点赘述。

麻省理工公开课 - 固态化学导论课程节选

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

耶鲁公开课 - 基础物理课程节选