The point is simply that facts and conventional wisdom can change very fast.
我只是想说明，现实和传统智慧可能瞬息万变。
One of the most important facts is that the world population is growing fast.
其中一个重要的事实就是世界人口正在快速增长。
The fast speed of light produces some strange facts.
如此快的光速产生了一些奇特的现象。
The fast speed of light produces some strange facts.
如此快的光速产生了一些奇特的现象。
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