In general relativity, time is considered a dimension like height, width and depth, creating a four dimensional universe called space-time.

在广义相对论中，时间被看作和长宽高一样的维度，并与它们构成了一个四维宇宙—被称作时空。

youdao

For those keen to know more: the computations involve "envisioning space and time as part of a four-dimensional crystal lattice, with discrete points spaced along columns and rows.

一点额外的话给那些想要知道更多的人：这个计算包括 “想象一下，时间和空间将成为水晶方格似的四维空间的一部分，不连续的点在空间纵横其间。”

youdao

Its description of time travel in a four-dimensional universe presaged the cottage industry in theoretical space-time machines that has sprung up among physicists in recent decades.

近几十年中物理学家们争先恐后进行理论上时光机器的研究，就证明《时间机器》关于四维宇宙中时光旅行的描写极具预见性。

youdao

Space-time, according to Einstein's theories of relativity, is a four-dimensional fabric woven together by space and time.

WSJ: Einstein Proved Right on Gravity��Again

Now imagine this happening in the four-dimensional fabric of space and time.

NPR: Einstein: Relatively Speaking, a Complicated Life