老年并不有趣,直到你真正到达那个年纪。
拥有而不需要,总比需要而没有好。
In business, the only constant is change, and adaptability is our greatest asset.
The beauty of a mathematical proof lies in its simplicity and inevitability.
自己不愿意的,不要强加给别人。
数学的历史是人类心灵独创性和创造力的证明。