原子价

It combines, with valence 2, 4, or 6, with nearly all other elements.

它能与几乎所有其它元素化合，原子价为2、4或6。

Phosphorus has valence 3 or 5 in compounds, which have many uses in industry.

磷在化合物中的原子价为3或5，工业用途很多。

Iron in compounds usually has valence 2 or 3.

化合物中铁的原子价为2或3。

Their atoms have similar configurations and similar physical and chemical behaviour; the most common valence s are 3 and 4

它们的原子都有相似的配置，以及相似的物理和化学行为，最常见的原子价是3和4。

Lead in compounds has valence 2 and 4; an oxide is the most widely used.

铅化物的原子价有+2和+4价，其中铅氧化物是最广为使用的。

This could indicate breakage of covalent bonds in some of the high molecular weight components.

这可能指出原子价镣铐的毁损在高度的一些分子量成分。

This article analyses halogenous atoms' virtual orbital energy and some properties of the halogens,and explains some properlies reliably demonstrated by halogen atoms.

从卤原子价层轨道能量与卤族元素某些性质间的联系着手，用卤素原子的-EAVO来定量解释卤素某些性质表现出的规律性。

Also the performance of this modified electrode was compared with sodium molybdate modified platinum electrode. The cyclic voltammetry tests show that phosphomolybdic acid modified platinum electrode can increase the catalytic activity for methanol oxidation and it is almost the same as the mono-molybdate (Na2MoO4) modified Pt electrode does. This promote effect mainly comes from the transformation of different valency of molybdenum.

通过循环伏安和计时电流法研究了该修饰电极对甲醇氧化的电催化活性和抗中间产物的毒化作用，并比较了该修饰电极与其单酸盐(Na2MoO4)修饰铂电极的性能，测试结果表明：磷钼酸修饰铂电极能够提高对甲醇氧化反应的催化活性，基本上同其单酸盐Na2MoO4修饰铂电极的催化活性相当，并且这种促进作用主要是由Mo原子价态变化引起的。

Having a valence of four; tetravalent.

四价的；四个原子价的

"These metals are similar chemically because their atomic structures are generally similar; all form compounds in which they have valence 3, including stable oxide s, carbides, and borides."

这些金属的化学性质十分相似，因为它们的原子结构通常相似；它们都可以与其它元素形成化合物，包括稳定的氧化物、碳化物、硼化物，它们在其中的原子价为3价。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。