The result shows that there exists combined removal of nitrogen in filter layer, and the environmental conditions in the system are determined as follows: DO level is 1.

为实现高效低耗脱氮，对扩展流好氧滤池的除碳、脱氮特性进行了研究，结果表明滤层内存在复合脱氮过程，相应的系统环境条件：DO为1。

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Treating combined sewage effluent from a secondary treatment plant, the process achieved 94.5% cadmium removal for the trace quantities present .

用这种方法处理二级处理厂排出的综合下水，可除去水中含镉量的94.5。

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Experiment on population removal capacity of the new constructed wetland composed with combined packing, Canna, Margaryamelanoide and Misgurnusanguillicaudatus Cantor was conducted.

通过实验方式研究了组合填料结合构成的新型人工湿地净化自然水体的作用。

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After the Botox wore off, one group had a face-lifting surgery combined with the removal of muscle tissue or nerves in the area that triggered the migraines.

CNN: Facial surgery may offer migraine cure

The most economical and effective congestion solutions involve traditional road building and transit use, combined with traffic management strategies such as signal coordination and rapid crash removal, and demand management strategies like telecommuting and flexible work hours.

FORBES: Chris Christie and the Highway Spenders