So traveling back in time is nothing more or less than the fourth-dimensional version of walking in a circle.

因此，穿越时间回到过去就跟在第四维空间里走了一个圈没什么区别。

youdao

I will circle back to some theoretical issues in their design later.

稍后我会转回到设计中的一些理论问题。

youdao

In this illusion, the circle placed further back in the tunnel appears larger than that placed near the front.

在这个错觉中，在隧道后方远处的圆看起来比在隧道前面的圆大一些。

youdao

It's been a while since I've won, so hopefully I can get back in that winning circle.

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