I am no physicist, but I imagine you have all blown air over the top of an empty bottle and heard the sound it makes.

我不是物理学家，但我想你们都曾往一个空瓶子的顶部吹过气，并听到过它发出的声音。

youdao

I am no physicist, but I imagine you have all blown air over the top of an empty bottle and heard the sound it makes.

我不是物理学家，但我想你们都曾往一个空瓶子的顶部吹过气，并听到过它发出的声音。

youdao