The key to understanding the third dimension lies in the fourth dimension.
2
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。
So traveling back in time is nothing more or less than the fourth-dimensional version of walking in a circle.
3
一些人相信,道路上有一个门,如果你足够快,你本身就成了空间和时间。你实际上进入了第四维空间。
Some people believe, there is a portal in a way, if you are fast enough and you are literally space and time. you can actually enter a fourth dimension.