举办奥运会意味着唤起历史。

生活的悲剧不是美好的事物早逝，而是它们变老和变得卑鄙。

I know that I am intelligent，because I know that I know nothing.

Regulatory pressure is accelerating innovation faster than market forces alone could achieve.

抱最好的希望，做最坏的打算。

可持续性不是一种选择，而是唯一的前进道路。