垢

Her apartment was immaculate.

她的公寓房间洁净无垢。

He allowed a fine patina of old coffee to develop around the inside of the mug.

他任由大杯内壁积聚上一层薄薄的咖啡垢。

Strings of dusty niggers with splay feet arrived and departed.

一帮帮污头垢面的黑人，脚向外张，进进出出，络驿不绝。

They may be solubilized by detergents or some protein denaturants.

在去垢剂和蛋白质变性剂的作用下，它们可以变为可溶性的。

We removed the accumulated filth of years from it with a cloth - brush.

我们用抹布擦去了它上面的积垢。