释义：通过分析物品的过剩与短缺，就能判断其价值的高低。这句话揭示了市场供求关系对价格的影响。

民族主义第六讲

You have to believe in yourself when no one else does.

I think it's important to have a balance in life. You can't just work all the time; you have to have fun too.

我们有责任为子孙后代留下一个比我们发现时更好的地球。