The leaves of an oak tree taste foul because they are rich in tannins, a chemical that renders them distasteful or indigestible to many organisms.
橡树的叶子尝起来很臭，因为它们含有丰富的单宁酸，这种化学物质会让很多生物感到不适或难以消化。
Tannins from the skins and sometimes stems of grapes and the oak barrels used for aging cause the bitter or astringent aftertaste in some red wines.
在一些红葡萄酒中，葡萄皮、葡萄梗和熟成用的橡木桶所带来的单宁会给人带来苦味或收敛性的感觉。
The freshness of the wine is balanced with fine oak tannins which lead to a long and complex palate.
该酒的活力与香草橡木单宁达到完美的平衡，引导出悠长复杂的口感。
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