平凡与非凡的区别在于那一点点额外的努力。
The difference between ordinary and extraordinary is that little extra.
The most powerful tool for improving decisions is feedback.
To understand the land is to understand ourselves.
I’m not playing for the records. I play tennis because I love it.
The mathematician's best work is art, a high perfect art, as daring as the most secret dreams of imagination, clear and limpid.
教学的艺术不在于传授本领,而在于激励、唤醒和鼓舞。