输入要查询的单词:
Civil Defense Siren
查词链接:
https://www.dute.org/dict/civil_defense_siren
复制链接 民防警报器:一种用于警告公众可能发生的危险(如空袭、核事故等)的大型喇叭,通常安装在城市的高处。
查看英英释义
abstract:
A civil defense siren (also colloquially referred to as an air raid or tornado siren) is a mechanical or electronic device (modern-day sirens are electrically powered whether they are electronic or electro-mechanical) for generating sound to provide warning of approaching danger and sometimes to indicate when the danger has passed. In some areas in the United States, civil defense sirens may sound in the late morning and early afternoon on a regular basis.
网络释义
防御警报
防御警报(Civil Defense Siren),又称空袭警报(Air Raid Siren),或户外警报(Outdoor Warnning Siren) 这种警报系统最初是在二战期间设计并使用的。
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