The Internet is a powerful tool for education, but it is not a substitute for the teacher.

The most important questions of life are, for the most part, really only problems of probability.

爱是一种极其困难的领悟，即认识到除了自己之外还有其他事物是真实的。

我们不断改进我们的模型以提高性能。

I’m not playing for the records. I play tennis because I love it.