We all know that light travels faster than sound. That''s why certain people appear bright until you hear them speak.

We all know that light travels faster than sound. That''s why certain people appear bright until you hear them speak.

我们都知道光比声音传播得快。这就是为什么有些人在你听到他们说话之前会显得很聪明。

-- Albert Einstein 爱因斯坦