从初级处理的污水缓缓流过浅的人工流。
Effluent from the primary treatment slowly flows through a shallow artificial stream.
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预防和治疗可通过初级卫生保健方面得到妥善处理。
Prevention and treatment are best managed through a primary health care approach.
初级市场处理新债权的交易。
Primary markets handle the sale of new securities.
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