The urban sewer systems and the wastewater treatment plants have detrimental impacts on the receiving river water quality.

城市排水管网与污水处理厂的运行状态直接影响受纳河流的水质。

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Trimethylamine (TMA) gas is the main gas come from deterioration of fish and one of the major odor gases existing in urban sewer.

三甲胺(TMA)气体是鱼类水产品变质后释放的主要气体，也是城市下水道释放的主要恶臭气体之一。

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Trimethylamine (TMA) gas is the one of major odor gases existing in urban sewer. Recent researches in TMA gas sensor focus on inspecting freshness of fish.

三甲胺（TMA）气体是主要的城市下水管道恶臭物质之一，目前对三甲胺气敏材料的研究主要集中在鱼鲜度的测定。

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Among the yuckiest fears of urban victims of superstorm Sandy was the potential for all that sea water surging into subway and sewer tunnels to displace the millions of rats who call the underground their home.

FORBES: No Rat Exodus Reported From NYC Tunnels. Millions Of Them Likely Drowned