生命中最伟大的荣耀不在于从未跌倒，而在于每次跌倒后都能站起来。

States are rational actors that seek to maximize their relative power in order to ensure their survival in a competitive international system.

I'm always looking for ways to challenge myself and push myself to the next level.

"The greatest thing in style is to have a command of metaphor."

宇宙学家经常犯错，但从不怀疑。