在部门总部和警察局之间连有警报器。An alarm links the police station to the divisional headquarters.消防车正要停下来，警报器发出刺耳的声音。The fire engines were just pulling up, sirens blaring.她听到警报器发出可怕的尖叫声。She heard the sirens scream their unearthly wail....

“警报器”的英语可以翻译为：siren，[机] alarming apparatus，annunciator ...