Today we are going to hear two different points of view on the space program.

今天我们要听听对于太空计划的两个不同的观点。

youdao

Time and space are one of the key points of physics.

时间与空间是物理学关注的焦点问题之一。

youdao

Time and space are one of the key points of physics.

时间与空间是物理学关注的焦点问题之一。

youdao