I don't believe in pessimism. If something doesn't come up the way you want, forge ahead. If you think it's going to rain, it will.

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

Innovation in coal mining isn't about reinventing the wheel, but about making the wheel more efficient and environmentally friendly.

语言中最具破坏性的一句话是：“我们一直都是这样做的。”