“impurity”的概念、定义、翻译、参考文献-科学参考

单词	impurity
释义	impurity [im`pyu̇r·ǝd·ē] ^{SCIENCE AND TECHNOLOGY} An undesirable foreign material in a pure substance. ^{SOLID-STATE PHYSICS} A substance that, when diffused into semiconductor metal in small amounts, either provides free electrons to the metal or accepts electrons from it.
随便看	automatic-alarm-signal keying device automatic back bias automatic background control automatic balance automatic bass compensation automatic batcher automatic bias automatic brazing automatic breech mechanism automatic brightness control automatic calibration automatic calling unit automatic call origination automatic carriage automatic casing hanger automatic C bias automatic celestial navigation automatic character recognition automatic check automatic check-out system automatic choke automatic chroma control automatic chrominance control automatic code automatic coding

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