世界充满痛苦，也充满战胜痛苦。

我爱上了你，我不会否认自己说出真相的简单快乐。

Coal’s future depends on our ability to make it cleaner and more efficient.

The most exciting aspect of catalysis is the endless possibilities it offers for discovery and innovation.

"A book is a conversation between the writer and the reader across time."

量化宽松的问题在于它在实践中有效，但在理论上却行不通。