竖笛是一种管乐器，竖笛的最上方有吹口。
A recorder is a wind musical instrument, and it has a mouthpiece at the top.
带有一个圆锥形孔和双簧管吹口的细小的木管乐器，具有三个八度音域和穿透力强而尖利的声音。
A slender woodwind instrument with a conical bore and a double reed mouthpiece, having a range of three octaves and a penetrating, poignant sound.
通过杯状或漏斗状吹口吹奏的铜管乐器。
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