你可以通过在毯子上撒盐来去除红酒渍。

You can remove a red wine ___stain from a carpet by sprinkling salt over it.

踢完足球后，他的牛仔裤上有一个草渍。

There is a grass ___stain on his jeans after playing football.

我意识到我裤子上有一个污渍。

I realised that I had a ___stain on my trousers.