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单词
filter bed
释义
filter bed
n.
(名词)
A layer of sand or gravel on the bottom of a reservoir or tank, used to filter water or sewage.
滤垫:在蓄水池或大容器底部铺的一层沙或砾石,用于过滤水或污水
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tonsorial
tonsure
tonsured
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tonuses
tony
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too
took
took
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tool
tool
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更新时间:2026/2/6 6:09:39