理解经济波动的关键在于技术冲击与家庭和企业决策之间的相互作用。

一年最好的时光在春天，一天最好的时光在早晨；一家最重要的是和睦，一生最重要的是勤奋。

I think that in mathematics, and maybe in life, you have to be willing to be a little bit lost.

The greatest threat to our forests is not logging, but indifference.

I don't believe in luck. I believe in hard work.

农民是我们全球食品系统中无名的英雄。