A sewer is a large underground channel that carries waste matter and rain water away, usually to a place where it is treated and made harmless. 下水道
noun [专属名词] 下水道，阴沟；缝纫工，缝纫机；（中世纪贵族宅邸中的）司膳管家
...the city's sewer system. … 该城市的下水道系统。
verb [vt. 及物动词] 为……铺设污水管道，用下水道排除……的污水；清洗污水管
He would tell her, "Oh, sinful wretch, who is spreading disease and filth like an open sewer." 他会告诉她：“噢，可恶的家伙，像露天下水道一样传播疾病和污秽。”
