用户需求是产品开发的出发点，也是落脚点。
Investors should avoid trying to predict the market; it's a fool's errand.
仅仅观察、实验、理论化和计算是不够的。人们还必须想象。
The prosperity of a nation is built on the diligence of its people.
我是一个喜欢在顶端的人。