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排污水系统的英文：
sink duainager sink是什么意思：
v. （使）下沉；渐渐进入；淹没；消沉；渗透；挖掘
n. 洗涤槽
sink into a decline
开始衰落，衰弱下去，体力衰退 Sink or fall to a lower level.
下沉或下降到更低的水平。 swallow hold (sink, sinkhold)
落水洞 Many sands will sink a ship
积沙沉船 There's a backup in the sink.
下水道堵塞。 | 
