重点词汇
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冲洗
flush; rinse; wash; develop; wash down; sluice; swill; washing
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下水道
sewer; drain; cloaca; gully drain; kennel
sluice a sewer
冲洗
flush; rinse; wash; develop; wash down; sluice; swill; washing
下水道
sewer; drain; cloaca; gully drain; kennel