a large amount of wastewater from piggery farm is mostly discharged directly without appropriate recycle and treatment, which can bring about a serious pollution to the environment.
养猪场排放的大量废水,大多未经妥善回收利用与处理即直接排放,对环境造成严重的污染。
as large amounts of wastewater from piggery farm are mostly discharged directly to environment without appropriate recycle and treatment today, that bring about a serious pollution.