英语语法分析

This method was used for the analysis of ferrous valences in iron ore sample with satisfactory results.

此法用于铁矿石样品中铁的价态分析，结果令人满意。

Effective valences of copper in superconducting oxides were calculated from the concept of bond valence.

从键价的概念出发，对氧化物超导体中铜离子的有效电荷进行了计算。

The attachment of a group to a central metallic agent such as iron with two valences to form a heterocyclic ring.

一种基与中心金属离子(如二价铁离子)结合，形成杂环。