最好的商业模式往往是最简单的。

我是行尸走肉，但我只是一个说话的脑袋，一个漂浮的僵尸，但我永远不会死。

语出西汉·桓宽《盐铁论·力耕》 。治理家庭不能靠一件财宝；治理国家，不能靠一种方法。

User experience outweighs commercial interests.

Innovation in mining isn't optional—it's essential for survival and growth.

Everyone is in favor of free speech. Hardly a day passes without its being extolled， but some people's idea of it is that they are free to say what they like， but if anyone else says anything back， that is an outrage.

Prediction is very difficult, especially about the future.

在数学研究中，坚持是关键；许多伟大的成果来自于一遍又一遍地从不同角度看待同一个问题。