我发明的竖笛会给小学生带来方便。我们买的竖笛难以拆洗,而我发明的多功能竖笛有非常特别的拆洗功能。你只需按动一下竖笛后面的按钮,就会有一个小手似的机械装置出来帮你拆竖笛。拆好后拿到水池边按一下绿色按钮,就会有一个小的棉球出来洗竖笛。这种竖笛还有一个好处:不管吹多久,它都不会走音。 The whistle I invented will bring convenience to elementary students. The clarinet we bought was difficult to take apart and wash, and the multifunctional clarinet I invented had a very special washable function. You simply press the button behind the clarinet, there will be a little hand-like mechanical out of the flute to help you out. After the pool is demolished and click the green button, there will be a small cotton ball out of the flute. There is one more benefit of such a clarinet: it will not go silent no matter how long it blows.