科学不仅仅是关于事实，而是理解支配这些事实的基本原理。
Science is not just about facts, but about understanding the underlying principles that govern those facts.
处于逆境中，就好比周身都扎着针、敷着药；冥冥中却能磨炼人的意志、培养高尚的品行。处于顺境中，就好比被各种各样的兵器包围；冥冥中掏空了身体，消磨了向上进取的意志。
We see our customers as invited guests to a party, and we are the hosts. It's our job every day to make every important aspect of the customer experience a little bit better.
学习理论中的一个关键见解是，假设类的复杂性对于泛化至关重要。