And what we know, or think we know, about the universe of space and time is changing very quickly.

And what we know, or think we know, about the universe of space and time is changing very quickly.

我们所知道的，或者说我们认为我们所知道的，关于宇宙空间和时间的变化非常快。

-- Fred Saberhagen 弗雷德·萨卜哈根