美不是奢侈品，而是灵魂的必需品。

色散理论是连接量子力学的抽象形式与我们观察到的具体现象之间的桥梁。

Sustainable development is not an option, but a necessity for the coal sector.

History is made of moments, both big and small.

"Purpose gives meaning to mental activity."

You don't need to change a single thing about yourself.

你写作不是因为你想说什么，而是因为你有话要说。