污点

There's a smear on your shirt.

你衬衫上有个。

The moths tapped and blurred at the window screen.

飞蛾在窗帘上跳来跳去, 弄上了许多。

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

去除领子上最好办法是使用未稀液体洗洁净。

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

我用小块（ conceal ) 将上遮盖起来。