Placing the usual swine manure in the fields can increase the phosphorus content of the ground. And when rains cause the phosphorus to wash away, it can harm the environment.

• 把普通的猪粪浇灌在农田里可以增加土壤中磷的含量。但是下雨的时候就会冲走土壤中的磷，这样就对环境有害了。