当我刚接触到治理的时候，我觉得把它联系到实际非常困难。
When I started with governance, I found it really difficult to boil down theory to practice.
悬浮填料是在生物接触氧化法处理污水中起着重要作用的水环境治理材料，已引起国内环境材料研究人员的广泛关注。
The suspended packing is an important material for water environment control, because it plays key role in biological contact oxidation.
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