中心地的等级越高,其服务的区域越大,此类中心地的数量越少。
"The best stories come from asking difficult questions, not providing easy answers."
The universe is a quantum computer.
In business, as in life, the choices we make define who we are.
写文章的方法,必须先确立大的方面,然后才能顾及小的细节。
语言是唯一的家园。