消化道是一条穿过整个生物体的管道。

纯洁的手不需要手套来遮盖。

Being something and doing something that no one had done before are two different things.

In China, the development speed of the internet is much faster than in the US because we have no historical baggage.

Innovation is not an option; it's a necessity for the survival of the coal industry.

The best way to predict the future is to create it.