...动物营养与饲料科学重点学科分类：常量与微量元素必需微量元素（分类：常量与微量元素必需微量元素（essential mineral element ）1普遍存在动物组织并分布均匀含量稳定第五节矿物质（第五节矿物质（mineral element)1 、普遍存在动物组织并分布均匀含量稳定2...
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?必需矿物质元素
... essential mineral 主要矿物 essential mineral element必需矿物质元素 essential minerals 必需矿物质 ...
双语例句
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Tobacco is an important economic crop, and nitrogen is essentialmineralelement. Studies on carbon and nitrogenous metabolism of tobacco have important action on tobacco production.
The balance combination of mineral substance , kinds of trace element increase and the dog's 11 kinds of essential amino acids, causes your pet to be healthier, and with a brighter wool color.