(alumina 的复数) n. 矾土
[化] 矾土; 氧化铝

plural of alumina
n. any of various forms of aluminum oxide occurring naturally as corundum

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发表于:2018-12-16 / 阅读(43) / 评论(0)

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发表于:2019-01-30 / 阅读(87) / 评论(0)

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