Porus acusticus internus

例句：

1. 1. The acoustic guitar is a popular instrument among musicians.
   声学吉他是音乐家们常用的乐器。
2. 2. The sound of the waves resonated through the room.
   波浪的声音在房间里回荡。
3. 3.Acoustics play an important role in understanding music.
   声学在理解音乐中起着重要作用。