The second most abundant element is silicon at 27 percent, followed by aluminum at 8 percent, iron at 5 percent, calcium at 4 percent, and sodium, potassium, and magnesium at about 2 percent each.
第二丰富的元素是硅，占到27%，再其次是铝、占8%，铁5%，钙4%。硫、钾和镁每种占大约2%。
Magnesium is an essential element in human nutrition; it is the cofactor in enzymes of carbohydrate metabolism and in chlorophyll.
镁是人体营养的一个重要元素，也是在碳水化合物代谢中的和叶绿素中的辅助因子。
Magnesium is an indispensable and important element with many important physiological functions.
镁是人体必需的元素，具有重要的生理功能。
Is a long-acting fertilizer for acid soils or neutral soil, the supply of plant phosphorus, magnesium and silicon, calcium element.
是一种长效磷肥，适用于酸性土壤或中性土壤，供给植物磷、镁和硅、钙等元素。
There is further described a crystalline catalyst comprising the elements nickel, magnesium, aluminium and a lanthanide element, in which the crystalline phase is a spinel phase.
还描述了包括元素镍、镁、铝和镧系元素的结晶催化剂，其中结晶相为尖晶石相。
Mischmetal absorptivity and its effects on the element contents in pure magnesium and AZ91D alloy were investigated.
对纯镁及AZ 91 D镁合金中添加富铈混合稀土的收得率及其各元素含量的变化规律进行了研究。
In the base of the flow stress model of AZ31, finite element analysis software DEFORM was used to research the drawing of the notebook PC case with magnesium alloy AZ31 sheet.
在材料模型的基础上，利用DEFORM有限元软件对AZ 31变形镁合金板温拉深笔记本外壳实验做了模拟。
The main work in this thesis is the adsorption performance of magnesium oxide absorbent in removing nourishing element phosphorus from wastewater.
研究了活性氧化镁吸附剂对污水中富营养化元素磷的去除性能；
In order to develop the high plastic wrought magnesium alloy, the paper studied the Superiority of adding rare earth element Y of Mg-Zn-Zr magnesium alloy with low Zn content.
为开发高塑性的变形镁合金，本文对低锌含量镁锌锆系合金中添加Y后的若干特性和优势展开了研究。
So it is necessary to study hot stretch properties, hot drawing of shell parts and its finite element simulation of magnesium alloys for providing technical supports of plastic processing.
由于镁晶体为密排六方结构，镁合金的室温塑性加工能力较低，因而很有必要研究镁合金的热拉伸性能，壳形件热拉深成形及其有限元模拟，为今后镁合金塑性加工提供必要技术支持。
The magnesium oxide vapor-deposition material comprises metal oxide in which the valence of the metallic element (s) is any of 3, 4 and 5 in the range of 0.01 to 6 mol %.
它是含有0.01 ~6摩尔%范围的金属元素化合价为3价、4价或5价的任意一种的金属氧化物的氧化镁蒸镀材料。
The magnesium oxide vapor-deposition material comprises metal oxide in which the valence of the metallic element (s) is any of 3, 4 and 5 in the range of 0.01 to 6 mol %.
它是含有0.01 ~6摩尔%范围的金属元素化合价为3价、4价或5价的任意一种的金属氧化物的氧化镁蒸镀材料。
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