经济景观是一个由不同等级的中心地组成的系统，每个中心地为特定区域服务。
我不认为你能习惯名声带来的疯狂。
If a Nation expects to be ignorant and free in a state of civilization,it expects what never was and never will be....If we are to guard against ignorance and remain free,it is the responsibility of every American to be informed."
凡是陽性必刚强，刚强一定光明，光明则容易了解。凡是陰性必柔弱，柔弱一定陰暗，陰暗则难以预测。