短语词组短语bastion n host 设防主机bastion host cluster 集群堡垒主机Bastion Host Firewall 堡垒主机式防火墙Bastion Host Local Policy 堡垒主机本地策略bastion host detail 防御主机;桥头堡主机dual -homed bastion host 双归属 返回 bastion host