世界是平的，而我们正站在上面。

A sustainable future for coal depends on our ability to integrate cleaner practices without sacrificing the livelihoods of those who depend on the industry.

I don’t like to be afraid. I like to be fearless.

如果应用得当，技术可以成为发展的强大工具。

The law isn't justice. It's a very imperfect mechanism. If you press exactly the right buttons and are also lucky, justice may show up in the answer.

现代物理学的挑战不仅在于理解宇宙，还在于理解我们在其中的位置。