It is not enough to observe and experiment, theorize and calculate. One must also imagine.

医学的真正价值在于减轻人类痛苦

要理解未来，首先必须理解过去。

"The only thing that is truly valuable is time."

Each generation takes the earth as trustees.

文学是让不可见的东西变得可见的艺术。

对我们森林的最大威胁不是斧头，而是冷漠。