The study of mental processes requires both experimental and comparative methods.

Arrange whatever pieces come your way.

"The only way to make sense out of change is to plunge into it, move with it, and join the dance."

煤炭曾是工业进步的支柱，但其未来必须平衡经济需求与环境责任。

我们都是时间旅行者，以生命的速度向前移动，但总是回头看。