数学的研究就像空气或重力——它无处不在,你看不到它,但你知道它在那里。
In business, if you're not moving forward, you're falling behind.
幸福是拥抱一个人的时候你知道你在拥抱整个世界。 《雪》
The best way to buy a stock is when it's cheap, and the best time to sell is when it's expensive.