但并不因为是一个从站，必定意味着它将比主站要慢一点或更新不及时。
Just because a site is secondary doesn't necessarily mean it'll be any slower or less up to date than a primary site.
主要论述了系统主站和从站的结构和通讯原理以及数据库管理系统的功能模块。
Primarily describes the structure and communication principle of the systems master station and follow station, and the Data Base Managements fuction module.
主站和从站间的通信实时性好。
It can communicate efficiently between the main station and sub stations.
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