碘是机体必需的微量元素，是甲状腺合成甲状腺激素的基本原料。
Iodine is the essential microelement, and the primary material for thyroid to synthesize thyroid hormones.
本品原料选自营养均衡的天然海藻、腐殖质和各类有机质，含有多种微量元素。
Natural alga, humus and several of organic matter which has balanced nutrients and contain many microelements are the component of this product.
以铬黑t (T)为主要原料，通过正交试验，筛选出微量硬度指示剂的新配方。
Taking chrome black t (t) as main material, a new prescription of trace hardness indicating agent has been screened out through orthogonal test.
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