Hardness

(noun.) 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'.

(noun.) 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'.

(noun.) the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale.

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• There was something horrible to Dorothea in the sensation which this unresponsive hardness inflicted on her. 乔治·艾略特. 米德尔马契.
• But, oh dear, what is the hardness of stone? 威尔基·柯林斯. 月亮宝石.
• The strength of the blow depends on the hardness of the metal, and when one part is harder than another the workman alters his blows accordingly. 佚名. 神奇的知识之书.
• It is curious what patches of hardness and tenderness lie side by side in men's dispositions. 乔治·艾略特. 米德尔马契.
• The diamond teeth are the only parts which come in contact with the rock, and their hardness is such that an enormous length can be bored with but little appreciable wear. 佚名. 神奇的知识之书.
• No scorn, no hardness, no valor any more! 沃尔特·李普曼. 政治序论.
• The veil fell from his hardness and despotism. 夏洛蒂·勃朗特. 简·爱.
• An object, stone, orange, tree, chair, is supposed to convey different impressions of color, shape, size, hardness, smell, taste, etc. 约翰·杜威. 民主与教育.
• Their hardness--their hideous, worldly hardness--revolted me. 威尔基·柯林斯. 月亮宝石.
• Later on, after Plato was dead, he set up a school at the Lyceum in Athens and taught, criticizing Plato and Socrates with a certain hardness. 赫伯特·乔治·威尔斯. 世界史纲.
• Nothing, compared to the hardness of the unregenerate human heart! 威尔基·柯林斯. 月亮宝石.
• The object is to impart hardness to the rubber, and to prevent its losing the form into which it has been pressed. 威廉K.戴维. 智者、化学家和伟大医生的秘密.
• It varies a great deal in hardness as well as in color and for that reason must be selected with care when desired for building purposes. 佚名. 神奇的知识之书.
• And in like manner does the touch adequately perceive the qualities of thickness or thinness, of softness or hardness? 柏拉图. 理想国.
• I would she had retained her original haughtiness of disposition, or that I had a larger share of Front-de-Boeuf's thrice-tempered hardness of heart! 沃尔特·司各特. 艾凡赫.

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