A sluice is a passage that carries a current of water and has a barrier, called a sluice gate, which can be opened and closed to control the flow of water.
VERB
冲洗
If you sluice something or sluice it down or out, you wash it with a stream of water.
例句
He sluiced the bath and filled it...他冲洗了浴缸，然后放满了一缸水。Ten minutes later we were sluicing off dust at the fountain in the town centre.10 分钟之后，我们就在市中心的喷泉里冲洗身上的灰尘了。