实际应用中使用统一的硬度标度是必要的。
It is necessary to apply unitary scale of hardness in practice.
只有维氏硬度试验可以使所有金属建立起连续一致的维氏硬度标度，但原试验手段效率低。
The hardness of all metals samples can be continuously established with the same scale by Vickers hardness test. But the test methods are inefficient.
阐述离子和化合物的广义酸碱分类，软硬酸碱反应规则，软硬酸碱的硬度定量标度和理论解释。
Expatiating on Lewis acids and bases of generalization, Hard and Soft of acids and bases reaction rule, classification, scaling of HSAB and its explanation of theory.
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