The police were called, but it was a false alarm.打电话叫了警察,却是一场虚惊。The report that the factory would be closing was a false alarm.说工厂要关闭的传闻是一场虚惊。He thought he might be having a heart attack, but his chest pains were just a false alarm.他原以为可能犯心脏病了,但他的胸口痛只是一场虚惊。