burglar alarm
noun [ C ] uk/ˈbɜː.ɡlər əˌlɑːm/ us/ˈbɝː.ɡlɚ əˌlɑːrm/
防盗警报器
a device on a building that gives a warning such as making a loud noise or flashing a light, or tells the police, if someone tries to enter the building illegally
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