The optimization of delivery vehicle dispatch system is one important part of the optimization of the physicaldistributionsystem.
配送车辆调度系统优化是物流配送系统优化的重要内容之一。
2
The abstract system that an author constructs exists only in his mind, and the physical manifestation — the book — is only a convenient means of storage and distribution.
作者建造的抽象系统仅仅存在于他的脑海里，它的物理表现(书)仅仅是为了方便的保存和发行的一种手段。
3
On this basis, system evolutionary methods are achieved, including physical evolutionary method, logical evolutionary method, data distribution evolutionary method.