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单宁 dān níng
agric.	tannin (C₇₆H₅₂O₄₆); tannon
chem.	tannic acid
environ.	tannin One of a group of complex organic chemicals commonly found in leaves, unripe fruits, and the bark of trees. Their function is uncertain though the unpleasant taste may discourage grazing animals. Some tannins have commercial uses, notably in the production of leather and ink; used in tanning, as a mordant in dyeing, and in ink manufacture (复杂的有机化学品，常见于叶子，未成熟的水果和树木的树皮。它的功能不确定但令人不快的味道可能不允许用于放牧牲畜。有一些单宁具有商业用途，特别是在皮革和油墨生产；用于制革，作为媒染剂染色和油墨制造材料。)
sport., med.	tannin

单 宁 : 149 phrases in 17 subjects

Agriculture	38
Animal husbandry	5
Architecture	1
Biochemistry	1
Chemistry	37
Drilling	1
Ecology	1
General	29
Medical	1
Oil / petroleum	19
Perfume	1
Pharmacology	5
Polygraphy	1
Polymers	3
Technology	2
Textile industry	2
Water resources	2