http://www.pons.de/produkte/3-12-517841-X/（牛津大学出版社授权产品）
http://www.pons.de/produkte/3-12-517841-X/（牛津大学出版社授权产品）
rat [美 ræt, 英 rat] 名词
1. rat 动物:
在《PONS词典》中的词汇
sewer rat 名词
在《PONS词典》中的词汇
在《PONS词典》中的词汇
在《PONS词典》中的词汇
在《PONS词典》中的词汇
无例句可用
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单语范例（未经PONS编辑处理）
Most commonly, a set of standard descriptors is used, which may range from fragrant to sewer odor.
en.wikipedia.org Infrequently used plumbing fixtures may allow sewer gas to enter a home due to evaporation of water in the trap, especially in dry weather.
en.wikipedia.org Domestic and industrial waste from the cities built up along the river, essentially turning the main-stem river into an open sewer by the 1920s.
en.wikipedia.org Gravity and pumping effluent sewer systems both have advantages and disadvantages.
en.wikipedia.org The player then escapes through sewer tunnels and an old mine shaft.
en.wikipedia.org