名词
中文翻译：公共用户网络
同义词：
['public network', 'public network system', 'public network infrastructure']
例句：
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1. The common usernetwork is a vital component of the city's communication system.
公共用户网络是该市通信系统的重要组成部分。
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2. The development of the common user network has greatly improved people's daily lives.
公共用户网络的发展极大地改善了人们的生活。
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3. The common user network provides reliable and secure communication services for all citizens.
公共用户网络为所有市民提供了可靠和安全的通信服务。