名词
中文翻译：二次污水处理
同义词：
['tertiary sewage treatment', 'secondarywastewater treatment']
例句：
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1.The city has implemented a new policy toimprove the quality of its secondary sewagetreatment plants.
该市实施了一项新政策，以提高其二级污水处理厂的水质。
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2. Thecompany's secondary wastewater treatment processis highly efficient and environmentally friendly.
该公司的二级废水处理工艺高效且环保。
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3. Thegovernment has been working on developing more advancedtechnologies for secondary sewage treatment.
政府一直在努力开发更先进的技术用于二级污水处理。