英语词汇“filter bed”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	filter bed
释义	filter bed n. A layer of sand or gravel on the bottom of a reservoir or tank, used to filter water or sewage.
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英语词典包含135693条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。