space time

例句：

1. 1. The astronaut spent a significant amount of time in space.
   宇航员在太空中度过了相当多的时间。
2. 2.The discovery of the universe is still a subject of debate among scientists.
   宇宙的发现仍然是科学家之间争论的主题。
3. 3. Time travel is an intriguing concept that has fascinated people for centuries.
   时间旅行是一个引人入胜的概念，几个世纪以来一直吸引着人们。