学习数学的最好方法就是做数学。
The best way to learn mathematics is to do mathematics.
The world is a great poem, and we are the verses.
"To live is to choose, but to choose well, you must know who you are and what you stand for."
The attosecond timescale is to electron motion what the high-speed camera was to studying animal locomotion.
在桂林学界迎会的演说，1922年1月22日
真正的成长意味着不断超越自己，勇于尝试新事物并接受失败的可能性。
Never stop learning; the moment you do, you become obsolete.
Every action has its pleasures and its price.
We don't inherit the earth from our ancestors; we borrow it from our children—this is especially true in forestry.