fluted tube

例句：

1. 1. Theflute player played a beautiful piece ofmusic for the audience.
   长笛手为观众演奏了一首美妙的音乐。
2. 2. The tuba is used in marching bands andorchestras.
   大号在行进乐队和管弦乐队中被使用。
3. 3. The flute is a popular instrument among young people.
   长笛是年轻人中流行的乐器。