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。
如果你不投资未来,你就不会有未来。
The most important thing in science is not so much to obtain new facts as to discover new ways of thinking about them.
Silence is very important. The silence is just as important as the notes.
Strategy execution is more important than strategy formulation.