Ignorance is the root and stem of all evil.

Sustainable mining isn't an option anymore - it's our responsibility to future generations.

科学中最重要的不是获得新的事实，而是发现思考它们的新方法。

When public speaking， pause frequently. Pause before you say something in a new way， pause after you have said something you believe is important， and pause as a relief to let listeners absorb details.

我们编造恐怖故事来帮自己应对真实的恐怖。