fud

例句：

1. 1. The farmer used the manure from his cows to fertilize his fields.
   农民使用牛的粪便来施肥他的田地。
2. 2. The trash collector came today to collect the city's waste.
   垃圾收集者今天来收集城市的废物。
3. 3. The scientist analyzed the samples and found that they contained fud.
   科学家分析了样本，发现它们含有粪肥。