咖啡渣

例句：

1. 1. The cafe owner was surprised to find that the cup of coffee he had left on the table was now fullof coffee grounds.
   咖啡馆老板惊讶地发现，他放在桌上的杯子里现在满是咖啡渣。
2. 2. The waiter offered a complimentary glass of water as a gesture of goodwill after cleaning up the coffee grounds from the table.
   服务员在清理桌子后，用免费的水杯作为善意的象征。
3. 3. The café's manager noticed the amount of coffee grounds in the waste bin and decided to invest in a more efficient coffeegrinder.
   咖啡馆经理注意到垃圾桶里有大量咖啡渣，决定投资购买一个更高效的咖啡磨豆机。