英语词汇“layered gravel and charcoal to make a filter”的翻译、意思、用法、释义-英汉汉英双解词典-爱贷网

词汇	layered gravel and charcoal to make a filter
释义	layered gravel and charcoal to make a filter 将砂砾和木炭分层以做成过滤器
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