至少在专用线路的环境里登录一次的翻译：In an environment of private line login at least once 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Dedicated lines at least once a login environment

In an environment of private line login at least once

At least registers one time in the owner-use circuit environment

At least in the environment, dedicated lines log in

In an environment of private line login at least once