我敬佩简单的快乐，那是复杂性最后避难所。

城市的穷人就像树的根：看不见，但对生存至关重要。

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

"We must focus on long-term value creation rather than short-term gains."

Investing in cleaner coal technologies is an investment in our future.

身边的人都不能亲近，就不要希望招徕远方的人。