proximate composition是什么意思

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proximate composition
近似组份；
一般组成
Chemical compositions,including proximate composition,mineral,fatty acid andmonosaccharide compositions of inner barks and extractives of the Eucommia ulmoides Oliv.
研究了杜仲内树皮及其抽提物的一般物、矿物质、脂肪酸与单糖的化学组成.
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