Some foods can stain the teeth, as of course can smoking.某些食物会在牙齿上留下污渍, 吸烟当然也会。

She stained the table black to match her new chairs.她把桌子刷成黑色以搭配新椅子。

There was a dark oval stain on the chair.椅子上有一块深色的椭圆形污渍。

Remove stains by soaking in a mild solution of bleach.用漂白剂稀溶液浸泡, 以除去污渍。