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单词
litmus
释义
litmus n[U] blue colouring-matter that is turned red by acid and can be turned blue again by alkali 石蕊(蓝色物质, 遇酸变红, 再遇硷则还原变蓝).
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sanitary
sanitary towel
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sanitize
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sapling
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sappy
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更新时间:2024/10/5 12:24:49