excessive sternness; "severity of character"; "the harshness of his punishment was inhuman"; "the rigors of boot camp" 同义词：severity, severeness, harshness, rigor, rigour, rigorousness, rigourousness, inclemency, stiffness,
the quality of being difficult to do; "he assigned a series of problems of increasing hardness"; "the ruggedness of his exams caused half the class to fail" 同义词：ruggedness,
devoid of passion or feeling; hardheartedness 同义词：unfeelingness, callousness, callosity, insensibility,
a quality of water that contains dissolved mineral salts that prevent soap from lathering; "the costs of reducing hardness depend on the relative amounts of calcium and magnesium compounds that are present"
the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale
例句与用法
1.
This process removes the water hardness . 这一工艺去除水的硬度。
2.
He had slipped from hardness into affability . 他从声色俱厉变得和颜悦色。
3.
A kind of metallic hardness came into his voice . 他的声音带有一种刺耳的生硬的腔调。
4.
Hardness is caused by divalent metallic cations . 硬度是由一些两价金属阳离子引起的。
5.
With regard to hardness , the diamond is in a class by itself . 讲硬度，金刚钻是独一无二的。
6.
In some point, there seems a hardness of heart about him . 从某些方面看来，他这个人心肠冷酷。
7.
The hardness and inhumanity of the man was fast breaking up . 这人那冷酷无情的心情很快地消灭了。
8.
Indentation methods of hardness testing comprise two principal groups . 压痕法测定硬度包括两大类。
9.
Beneath ruth's composure he sensed an uncharacteristic hardness . 在露丝的平静下面他感到一种反常的严酷。
10.
One simple way of describing strength is in terms of surface hardness . 描述强度的一种最简单方法是以表面硬度来表示。
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