The best products come from a deep understanding of the problem, not just a desire to make something new.

成功不仅仅是赚钱，而是有所作为。

I was rejuvenated.

The unity of mathematics is not an illusion but a reality waiting to be uncovered.

你的生活质量就是你关系的质量。

教师必须具有健康的体魄，农人的身手，科学的头脑，艺术的兴味，改革社会的精神。