学习数学的最好方法就是去做数学。
The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.
工作与生活的平衡不是个人问题，而是需要系统性解决的结构性问题。
Natural gas will play a crucial bridging role, but it cannot be the final destination.
The world is a mirror, and it shows you what you bring to it.
For every dollar you spend purchasing something substantial， expect to pay a dollar in repairs， maintenance， or disposal by the end of its life.