Happiness resides not in possessions and not in gold; the feeling of happiness dwells in the soul.
The most important skill in mathematics is the ability to think clearly.
梦想和目标的区别在于行动。
能源的未来不仅仅是开采,还包括可持续性和对资源的负责任管理。
数学的美在于它能够将复杂的思想简化为优雅的结构。