moving-conductor loudspeaker

例句：

1. 1.The moving-conductor loudspeaker is a popular choice for outdoor events.
   移动式控制扬声器是户外活动的一个流行选择。
2. 2.The new moving-conductor loudspeaker has been designed to improve sound quality.
   新的移动式控制扬声器被设计来提高音质。
3. 3.The moving-conductor loudspeaker was used in the concert to enhance the audience's experience.
   在音乐会上使用的移动式控制扬声器是为了增强观众的体验。