Market design is an ongoing experiment—what works today may need adjustment tomorrow.
你的时间有限,所以不要浪费在过别人的生活上。
Don't be embarrassed by your failures, learn from them and start again.
解释:辅与车互相依存,嘴唇没有了,牙齿就要受寒。
"We are all haunted by something, aren't we?"