If you’re hearing a whistling sound, the vent might be gunked up with limescale, a residue from minerals in the water.

如果您听到啸叫声， 则可能是通风口被水垢污染了，水垢是水中矿物质的残留物。

I was dislodging the limescale on the bathroom taps using kitchen roll soaked in vinegar (my mother's tip) when I heard Will's chair behind me.

当我听到 Will 的椅子在我身后时，我正在使用浸泡在醋中的厨房卷纸（我母亲的小费）去除浴室水龙头上的水垢。