"The past is never dead. It's not even past."
The greatest threat to our forests is not the axe, but indifference.
创新的关键不仅在于创造新技术,还在于理解如何应用它们来解决现实世界的问题。
Mathematics is the foundation upon which all sciences are built.
世界是一本美丽的书,但对那些无法阅读它的人来说几乎没有用处。