sapstain

例句：

1. 1. The stain on the shirt is from a previous meal.
   衬衫上的污渍是之前吃的食物留下的。
2. 2. He noticed that there was a stain on his shirt when he got home.
   他回家时注意到他的衬衫上有一块污渍。
3. 3. The stain on the carpet was caused by a spill of water.
   地毯上的污渍是由于水溢出造成的。