The key to credible causal inference is not just the method, but how well the method fits the question at hand.

人世间的罪恶几乎总是由愚昧无知造成，如果缺乏理解，好心能造成和恶意同样大的危害。

"Your most unhappy customers are your greatest source of learning."

挑战是伪装的机会；以勇气拥抱它们。

I have the same goal I've had ever since I was a girl. I want to rule the world.

在热量下降过程中，动力显然随冷热物体之间的温差增大而增加。