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n.污水坑；池；机油箱；v.挖深（渠道，井筒等）； 变形： 复数：sumps 英英释义： sump[ sʌmp ]n.an oil reservoir in an internal combustion enginea well or other hole in which water has collecteda covered cistern; waste water and sewage flow into it同义词：cesspoolcesspitsink
