你越沉溺于过去，就越少为未来做准备。
The more you dwell in the past, the less you prepare for the future.
If a lion could talk, we could not understand him.
任何一个时代的统治思想始终都不过是统治阶级的思想。
无人机不是玩具，而是改变行业的工具。
I write to make sense of the world.
物理系统的对称性反映在其能级的简并性上。
The first erroneous assumption is that quality means goodness, or luxury, or shininess, or weight.
以物易物、互通有无的倾向是人类共有的，也是其他动物所没有的。
If you’re not failing occasionally, you’re not pushing the boundaries enough.