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。
唯一无法得到帮助的人是那些责备他人的人。
如果你不驱动你的业务，你就会被淘汰出局。
You have to fight to reach your dream. You have to sacrifice and work hard for it.
The future is no longer what it was.
The first man who， having enclosed a piece of ground， bethought himself of saying 'This is mine，' and found people simple enough to believe him， was the real founder of civil society.
