hot wire loudspeaker

例句：

1. 1.The hot-wire detector is used to detect the presence of intruders.
   热线探测器用于探测入侵者的存在。
2. 2. The hot-wire microphone is a popular choice for recording live performances.
   热线麦克风是录制现场表演的热门选择。
3. 3. The hot-wire speaker is a convenient way to play music without plugging in an external device.
   热线扬声器是一种方便的播放音乐方式，无需插入外部设备。