Astr 黄芪提取物 ; 阿斯特拉
ANNU REV ASTRON ASTR 地学天文
astr al 星状的
astr o nomy 天文学
Astr By 铁臂阿童木
aq astr 冰水
Astr Nachr 天文学通报
ASTR Astronomy 天文学
ASTR combines the merits of proactive routing protocol and on-demand routing protocol because subarea tree has the function of routing selection.
由于分区树具有路由选择功能，所以ASTR结合了先应式路由协议和按需路由协议的优点。
ASTR belongs to hierarchical routing protocol: it divides the whole network into many subareas logically through establishing subarea trees and each subarea is composed of a tree.
ASTR属于分级路由协议，通过建立分区树，在逻辑上将网络划分为多个分区，每个分区由一棵树组成。
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