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单词 betulin
释义 betulin|ˈbɛtjʊlɪn|
[f. L. betula birch + -in.]
‘A resinous substance extracted from the outer bark of the birch-tree (Betula alba), or from the tar prepared therefrom.’ Watts Dict. Chem. 1879.
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更新时间:2024/9/20 0:35:24