有时候最真实的东西反而是你看不见的。
Sometimes the things that are most real are the things you can't see.
"The past is a shadow that follows us, but it does not have to define us."
过去半个世纪最重要的政治发展是自由民主在世界范围内的传播。
Colorless green ideas sleep furiously.
History has neither the venerable age of the earth nor the innocence of the child; it is always the result of human passions and human errors.
The future of coal lies in cleaner technologies and smarter resource management.