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n.丹宁酸

tannin为短语/超纲词汇

/'tænɪn; `tænɪn/
n [U] any of various compounds obtained from the bark of oak and other trees and used in tanning, dyeing, etc 鞣酸; 单宁; 单宁酸.

n alsotan·nic acid [,tænɪk 'æsɪd/

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