“vacuum”的概念、定义、翻译、参考文献-科学参考

单词	vacuum
释义	vacuum [`vak·yǝm] ^PHYSICS 1. Theoretically, a space in which there is no matter. 2. Practically, a space in which the pressure is far below normal atmospheric pressure so that the remaining gases do not affect processes being carried on in the space. ^{QUANTUM MECHANICS} The lowest possible energy state of a system, conceived of as a polarizable gas of virtual particles, fluctuating randomly.
随便看	sand-cast sand cay sand cone sand control sand count sand crystal sand devil sand dike sand dollar sand drain sand drift sand drip sand dune sander sandfall sand filter spherical distance spherical-earth attenuation spherical-earth factor spherical excess spherical geometry spherical harmonics spherical indicatrix of binormal to a curve spherical indicatrix of tangent to a curve spherical lens

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