Unlike shipping books or durable products via UPS, fresh food delivery requires specific shortrouting, planning, technology, and a race against the clock.
The main features of the router are the target orientation of the search lines, the rational data structures, the small amount of working storage and the reasonably shortrouting time.
方法的特点是线探索针对目标，数据结构合理，所需存储量小，布线速度快。
3
The above routing code is fine, and we've seen that this simple route is as short as any other.