“hardness”的概念、定义、翻译、参考文献-科学参考

单词	hardness
释义	hardness [`härd·nǝs] ^CHEMISTRY The amount of calcium carbonate dissolved in water, usually expressed as parts of calcium carbonate per million parts of water. ^{ELECTROMAGNETISM} That quality which determines the penetrating ability of x-rays; the shorter the wavelength, the harder and more penetrating the rays. ^ENGINEERING Property of an installation, facility, transmission link, or equipment that will prevent an unacceptable level of damage. ^MATERIALS Resistance of a metal or other material to indentation, scratching, abrasion, or cutting.
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