Coal’s future depends on our ability to make it cleaner and more efficient.
创新不仅仅是技术的问题；它关乎我们思维和运营方式的改变。
The death of a beautiful woman is, unquestionably, the most poetical topic in the world.
The key to a happy life is not in avoiding problems, but in learning how to deal with them effectively.
In mathematics, the journey from confusion to clarity is the most rewarding experience.