True progress comes from balancing economic growth with ecological responsibility.
"The truth is rarely pure and never simple."
理解经济波动的关键在于技术冲击与建造新资本所需时间之间的相互作用。
数学不知道种族或地理界限;对于数学来说,文化世界是一个国家。
You can't predict. You can prepare.