The hydrolytic acidification - oxygen filling film filter pond is used in a sewage treatment plant.
某污水处理厂采用了水解酸化—充氧膜滤池工艺。
An experiment in field and artificial penetration-filter pond test both were conducted to show factors affecting content of nitrate-nitrogen in soil in the present study.
采用田间试验及人工渗滤池试验方法，研究了土壤中硝态氮含量的影响因素。
While not strictly necessary, your pond can benefit from having a pump and biological filter to keep water cleaner.
虽然不是绝对必要，你可以受益于池塘有一个泵和生物过滤水保持清洁。
应用推荐