| 词汇 | tannin |
| 释义 | tannin /`tanɪn/ n. Astringent acid C16H52O46 present in various substances, as tea, gallnuts, sumac, and certain barks, used in tanning leather, in dyeing, in medicine, etc. 【化】鞣酸；单宁酸。化学式为C16H52O46。 |
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