The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.
我总是等机会错过了才发现我曾有过机会。
In computational learning theory, we seek to understand the fundamental principles that govern learning from data.
He was a man who had always been too proud to ask for help, and now he was too proud to accept it.
好比有一百扇门而只关上一扇，那么盗贼怎么就会没有地方进去呢