单词：alarm bell
[化] 警铃; 警报装置
alarm bell的用法和样例：
例句
- In case of fire, ring the alarm bell.如遇失火，请按警铃。
- The policemen have installed burglar alarm.警察已经安装了防盗的警铃。
- If there is no problem,there will be no alarm bell.如果没问题，则没有告警钟。
- A red bell alarm condition supersedes a yellow bell warning.红色警钟会替代黄色警钟。
- tocsin警铃
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