direct-radiator speaker

例句：

1. 1. The newcar has a direct-radiator speaker that can be turned on and off easily.
   这款新车有一个可以轻易开关的直辐射式扬声器。
2. 2. The music system in the theater is equipped with a direct-radiator speaker that provides excellent sound quality.
   剧院里的音响系统配备了一个直辐射式扬声器，提供出色的音质。
3. 3. The engineer tested the direct-radiator speaker to ensure it was working properly before installing it in the vehicle.
   工程师测试了直辐射式扬声器以确保它正常工作后再将其安装在车辆中。