We've done price elasticity studies, and the answer is always that we should raise prices. We don't do that, because we believe -- and we have to take this as an article of faith -- that by keeping our prices very, very low, we earn trust with customers over time, and that that actually does maximize free cash flow over the long term.

积极心理学不是忽视消极面，而是建立积极面

Every scientific discovery is a new dialogue with nature, bringing us closer to the mysteries of the universe.

化学是关于连接的科学，无论是字面上还是隐喻上。

我不是那种会让对篮球比赛的爱减少的人。