使用别名可以保留主机名所需的结构，同时简化用户使用的名称。
The use of aliases preserves the structure needed for host names and the ease of use desired by users.
采用向量标记推导模型，简化了模型结构，同时描述了模型的构成；
The vector mark is adopted to simplify the structure and to depict the composition of the models.
然而，要想做到“保持原有网络结构和简化变更设置，同时加强可用性”，又不是一件轻易的事。
However, want to accomplish "to maintain original network structure and simplify modificatory setting, strengthen usability" at the same time, not be an easy thing.
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