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词汇 alum
释义
alum
noun [ U ] chemistry specialized uk/ˈæl.əm/ us/ˈæl.əm/
(chemistry)
明矾,矾(含铝的化学物质,作为染色剂或收敛剂)
a chemical substance containing aluminium used in dyeing (= changing the colour of something) and as an astringent (= substance that causes skin to tighten)
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