柠檬问题是指买家无法确定产品质量,因此只愿意支付反映平均质量的价格。
The only way to make sense out of change is to plunge into it, move with it, and join the dance.
I don't chase records, records chase me.
We have a responsibility to future generations to leave the planet in better shape than we found it.
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。