ceiling diffuser

例句：

1. 1.The ceiling diffuser is designed to improve air circulation in the room.
   天花板扩散器旨在改善房间内的气流。
2. 2. The ceiling diffuser has a built-in humidifier, which helps to keep the air moist.
   天花板扩散器内置了加湿器，有助于保持空气湿润。
3. 3. The ceiling diffuser is an essential accessory for any modern home.
   天花板扩散器是任何现代家居的必备配件。