原子价

"These metals are similar chemically because their atomic structures are generally similar; all form compounds in which they have valence 3, including stable oxides, 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。

Their atoms have similar configurations and similar physical and chemical behaviour ; the most common valences 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。

Their atoms have similar configuration s and similar physical and chemical behaviour; the most common valences 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。

Manganese compounds, in which it has various valences, are used in fertilizer s and textile printing and as reagents and raw materials.

以各种原子价存在的锰化合物被用于化肥生产和纺织染印，还被用作试剂和原料。

Manganese compounds, in which it has various valences, are used in fertilizers and textile printing and as reagent s and raw materials.

以各种原子价存在的锰化合物被用于化肥生产和纺织染印，还被用作试剂和原料。

One is vitamin B12 (cyanocobalamin; see vitamin B complex).

原子价为2或3，能形成大量配位化合物或错合物，其中一种是维生素B12。

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。