The only real prison is the one we build for ourselves.

We are all made of star-stuff, and through physics, we seek to understand our origins.

Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.

I'm not perfect, but I'm trying every day to be better.

安全不仅仅是一项政策 - 它是一种必须渗透到我们组织各个层面的文化。

I don't want to be perfect, but I do want to be a role model.

煤炭的未来在于更清洁的技术和更智能的资源管理。