sewer基本解释
n,[建]下水道；阴沟；裁缝师,同近
...the city's sewer system..…该城市的下水道系统。
下水道；阴沟；裁缝师英释中释na pipe or passage under the ground that carries away waste material and used water from houses, factories etc
sewer pipe,污水管；下水管.短语
