短语词组短語audible ringing tone [通信]可聞振鈴音;廻鈴音;可聞振鈴聲audible signal tone 信號音Audible busy tone 佔線語音提示lowest audible tone 最低可聽音highest audible tone 最高可聽音tone audible 可聞純音 返回 audible tone