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.
个别二价体也不排列在赤道板上。
我们购物中心坚持货无二价政策。
对不起，太太，本店不二价。
你能便宜一点卖吗？对不起，不二价。
你能便宜一点卖吗？对不起，不二价。
Can you come down a little? — Sorry, it's one price for all.
你能便宜一点卖吗？—对不起，不二价。
你能廉价一点卖吗？—对不起，不二价。
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。
对不起，不二价。
对不起，不二价。
对不起，不二价。
对二价碘酸盐之间形成复盐的可能性也进行了探讨。
The possibilities of formation of complex compound between divalent iodates have been studied.
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.
不行，因为我们坚持货无二价的政策，每位顾客付款相同。
No. Because we keep to come-price policy, every customer pays the same.
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.
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.
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.
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.
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.
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