名词
中文翻译：门系统
同义词：
['gateway system', 'access control system例句：1. The portal system is the first thing visitors see when they enter the building.（门户系统是访客进入大楼时首先看到的东西。）']
例句：
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1. The portal system is the first thing visitors see when they enter the building.
门户系统是访客进入大楼时首先看到的东西。
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2. The portal system was designed to improve security and efficiency.
门户系统旨在提高安全性和效率。
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3. The portal system has been upgraded to support more users and data.
门户系统已升级以支持更多用户和数据。