污点

The moths tapped and blurred at the window screen.

飞蛾在窗帘跳来跳去, 弄了许多污点。

I used a throw rug to hide (or conceal ) the stain on the carpet.

我用小块毯（ conceal ) 毯的污点遮盖起来。

The best way to get stains off collars is to use liquid detergent at full strength.

去除领子的污点好的办法是使用未稀释的液体洗洁净。

There's a smear on your shirt.

你有个污点。