slop of a stack

例句：

1. 1. The river had become so sloppy that it was difficult to cross.
   这条河变得太浑浊了，难以过河。
2. 2. The car was stuck in the slop, and we couldn't get it moving.
   汽车陷在烂泥里，我们无法启动它。
3. 3. The farmer had to scrape off the slop from his fields before harvesting.
   农民在收割前不得不从田地中清除烂泥。