工学 城域网 释 metropolitan area network 城域网 一种介于局域网与广域网之间，覆盖一个城市的地理范围，将同一区域内的多个局域网互联起来的中等范围的计算机网。属于中距离的传输网络。城域网位于骨干网和接入网的汇接处，在信息传输网络中处于承上启下的位置。
网络与数据通信 协议体系与组成结构 释文 metropolitan area network, MAN 城域网
- betterment and reconstruction of existing railway
- "Better Service, Better Government" e-government strategy
- Betti
- Betti group
- Bettina
- Bettina Rheims
- Bettina von Arnim
- betting
- Betti number
- Betti number and torsion number
- Betti reciprocal theorem
- Betty Loh Ti
- Betty's Hope Museum
- Betula Deciduous Broadleaf Forest
- Betula ermanii Deciduous Broadleaf Forest
- betulic acid
- betulin
- betulinic acid
- betweenanene
- betweencenters
- Between Facts and Norms
- Between Friends
- between-group correlation
- between-group dispersion matrix
- between-group sum of squares