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1. Oxford American Dictionary

   burglar alarm

   • n.
     an electronic device that emits a loud noise or other alert when someone attempts to gain unauthorized entry to a building or other premises

   • noun: burglar alarm, plural noun: burglar alarms

2. • 釋義

   n.

   名詞

   • 1. an electronic device that emits a loud noise or other alert when someone attempts to gain unauthorized entry to a building or other premises police say the thieves are taking advantage of the homes and businesses that don't have burglar alarms