Coal’s future depends on our ability to make it cleaner and more efficient.
I'm not here to be perfect, I'm here to be real.
数学不是一门演绎科学——那是陈词滥调。当你试图证明一个定理时,你不仅仅是列出假设然后开始推理。你所做的是反复试验、实验和猜测。
Stay hungry, stay foolish.