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。
The study of mathematics is like air or gravity—it is everywhere, and you can't see it, but you know it's there.
最好的纪律方式是组织生活,使其不需要纪律。
Hard work and integrity are the cornerstones of any lasting business.
The heart of the educator must be a living flame, a source of warmth and light.