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,
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
其他语种释义
hardnessとは意味:hardness n. 苦難; 硬度. 【動詞+】 ◆endure hardness as a good soldier 立派な軍人らしく苦難に堪える. 【形容詞 名詞+】 ◆metallic substances of near-diamond hardness ダイヤモンド並みの硬度をもつ金属物質. 【前置詞+】 ◆He often complained of the hardness of ...