模形式的算术是理解高维对象的门户。

最大的风险是不冒任何风险。在一个快速变化的世界里，唯一注定失败的策略就是不冒险。

If you lose or forget to bring a cable，adapter or charger，check with your hotel. Most hotels now have a drawer full of cables，adapters and chargers others have left behind，and probably have the one you are missing. You can often claim it after borrowing it.

Great companies don't just adapt to change; they anticipate and shape it.