The change of time and space concept of theory of relativity is right-about.
经典电磁理论是四维协变的，相对论时空概念的改变是根本性的改变。
The concept of time and space plays an important role in understanding the world.
时空概念在人们认识世界的过程中起着很重要的作用。
The notions of space and time merge into a single concept: spacetime.
“赛博空间”是一种概念空间或数字空间。
The notions of space and time merge into a single concept: spacetime.
“赛博空间”是一种概念空间或数字空间。
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