因为铝离子为正三价,氧为负二价。
Because aluminum ions have charge of plus three and oxygen ions have charge of minus two.
我们购物中心坚持货无二价政策。
铬的，有关铬的或含铬的，特指二价铬。
Of, relating to, or containing chromium, especially with valence 2.
这是公司制定的统一销售价，不会有二价。
This is the uniform retail price determined by the company and there shall be no other prices.
我们这里是不二价的。
终变期末有些二价体的同源染色体只在末端连在一起。
Diakinesis bivalents end of some of the homologous chromosomes together only at the end.
一种基与中心金属离子(如二价铁离子)结合，形成杂环。
The attachment of a group to a central metallic agent such as iron with two valences to form a heterocyclic ring.
并讨论了二价碘酸盐水化物的稳定性与阳离子电负性的关系。
The stability of hydrated divalent iodates is expected to be related to the electronegativity of the corresponding cations.
渠道内进行着中和作用、铁与铝的沉淀作用及二价铁的氧化作用。
It carries on the neutralization, precipitation of iron and aluminum and ferrous oxygenation alone the channel.
通过顺磁共振的方法证实了反应过程中二价铜和稳定自由基的存在。
The electron spin resonance (ESR) spectrums demonstrated the existence of Cu(II) and stable radicals during the polymerization process.
用电生醌分别进行毫克量亚钛和二价钒的库仑滴定，误差为千分之几。
Coulometric titrations of milligram quantities of titanous ion and hypovanadous ion give errors less than 1 per cent.
本文在总结前人对汉语语序研究的基础上，考察了汉语两千多个二价动词。
This paper, based on a summary of the existing researches on Chinese word order, examines more than 2,000 bivalent modern Chinese verbs.
利用二价铁离子的联吡啶络合物，示差脉冲伏安法测定土壤中的二价铁离子。
This study attempted to determine ferrous ions through ferrous-bipyridyl chelate by differential pulse voltammetry.
结果显示配合物3有四边形孔穴的结构，荧光性能显示可以探测二价镁离子。
The results show: complex 3 have a square-like hole and may be employed in probing Mg~(2+) for use in fluoroimmunoassays.
与期望染色体配对模式相比，双二倍体中二价体出现的频率有明显增大的趋势。
Frequencies of bivalents in the amphidiploids tended to increase obviously in comparison with the expected chromosome pairing model of the meiosis.
用离子交换方法制备了铜交换的分子筛，研究了将二价铜还原为一价铜的方法。
Cupric ion exchanged NaY zeolite was prepared. The method to reduce cupric into cuprous exchanged zeolite was studied.
汉语中有的动词可能是一价或二价，但英语中的动词起码是二价，不可能是一价；
Some verbs used in the Chinese DOC sentences are inherently one or two-place, but verbs used in the English DOC is at least inherently two-place, can't be one-place;
在酸碱性土壤中，磷主要以植物难以吸收利用的难溶性二价或三价阳离子的形式存在。
In acid and alkali soil, there are mainly indissoluble bivalent or trivalent phosphates, which cannot be utilized by plants.
实验表明，所制备的纳滤膜能有效截留二价和多价阳离子，对单价阳离子的截留率极低。
The result showed that bivalent and multivalent cations could be removed effectively, while the rejection of univalent cations was very low.
目的构建柯萨奇病毒（CV）B1/B3型二价VP1基因免疫质粒，并探讨其免疫原性。
Objective To construct a bivalent VP1 gene vaccine against Coxsackie virus B1 and B3 (CVB1 and CVB3) and to test its immunogenicity in mice.
维生素b12可被氧化剂和还原剂、醛类抗坏血酸、二价铁盐、香草醛和阿拉伯树胶破坏。
Vitamin B12 is destroyed by oxidizing and reducing agents, by aldehydes, ascorbic acid, ferrous salts, vanillin and acacia.
所述系统包括与锌或任何目的二价阳离子交联的果胶珠粒，所述珠粒然后用型聚合物包被。
The systems include pectin beads crosslinked with zinc or any divalent cation of interest, which beads are then coated with Eudragit TM -type polymers.
铁的，含铁的铁的、有关铁的或含铁的，尤指带有二价铁或低于二价铁的相应含铁化合物。
Of, relating to, or containing iron, especially with a valence of2 or a valence lower than in a corresponding ferric compound.
合成了两个二价的过渡金属磺酸化合物，并通过X-射线衍射单晶结构分析进行结构表征。
Two novel divalent transition metal disulfonates were synthesized and characterized by X ray single crystal diffraction.
偶线期时，以同源染色体活跃的、特定的配对(联会)为特征，形成了单倍数的二价染色体。
Synapsis (pairing) the association of homologous chromosomes during the prophase stage of meiosis that leads to the production of a haploid number of bivalents.
本文研究了强碱性条件下，以乙二胺为络合剂，用水合肼把二价镍离子还原为单质镍的方法。
Under the condition that the strong basic is medium and ethylene diamine is complex reagent, the method that Ni2 + of wastewater is deoxidized by hydrazine hydrate is studied.
这颗彗星蒸发的冰中含有氰和二价碳，在太空真空环境下被阳光照射时，两种气体均发出绿光。
Vaporizing ices from the comet included cyanogen and diatomic carbon, both gases that glow green in sunlight out in the vacuum of space.
通过实验利用二价铁离子对天然有色蛋白质纤维进行预处理，可以有效的降低损伤，提高白度。
The experiment makes crude protein fiber a pretreatment with ferrous ion. It can increase whiteness and reduce the damage effectively as well.
通过实验利用二价铁离子对天然有色蛋白质纤维进行预处理，可以有效的降低损伤，提高白度。
The experiment makes crude protein fiber a pretreatment with ferrous ion. It can increase whiteness and reduce the damage effectively as well.
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