public address systems
美 [ˈpʌblɪk əˈdres ˈsɪstəmz]英 [ˈpʌblɪk əˈdres ˈsɪstɪmz]
- n.扩音系统
- public address system的复数
public address systemspublic address systems
频次
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1
N-COUNT 扩音系统（缩略形式为PA）
A public address system is a set of electrical equipment which allows someone's voice, or music, to be heard throughout a large building or area. The abbreviation PA is also used.The news was announced on the public address system at the high school.
消息是在这所中学的广播里宣布的。
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The acoustic feedback problem is a long-standing problem appearing in sound reinforcement systems and public address systems .
在扩声系统及公共广播（PublicAddress，PA）中，声反馈是一个长期存在的问题。
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These developments enable new functionalities in the public address systems for the benefit of railway operators and passengers .
继续发展的这些技术，给旅客信息系统提供了有利于铁路运营部门和旅客的新功能。