Principle and operation technology of removing silicon,phosphorous and arsenic from sodium wolframate is presented.
阐述
钨酸钠溶液中除硅、磷、砷的原理,并

具体的操
工艺。
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济学人-科技 They will also look at the chemistry of elements other than carbon and oxygen—particularly nitrogen and phosphorous, which are essential to life, and sulphur, which often indicates the absence of oxygen and is thus antithetical to much animal life.
他们不单单只是观察氧和碳元素,尤其是生命必须的氮和磷,



示缺少氧且和大部分动物生命对立的硫。