可持续发展不再是选择；它是当今世界生存的必要条件。
True progress happens when we stop competing over who's right and start collaborating on what works.
Good econometrics is like good carpentry—it's all about using the right tool for the job.
Even the strongest man needs someone to stand by him.
守时是尊重的表现。
I'm the reason your noise won't stop.