“beta”的概念、定义、翻译、参考文献-科学参考

单词	beta
释义	beta [`bād·ǝ] ^ASTRONOMY For dust grains ejected from the nucleus of a comet, the ratio of the radiation pressure force to the solar gravitational force. ^ELECTRONICS The current gain of a transistor that is connected as a grounded-emitter amplifier, expressed as the ratio of change in collector current to resulting change in base current, the collector voltage being constant. ^NUCLEONICS The amount of reactivity of a nuclear reactor corresponding to the delayed neutron fraction. ^{PLASMA PHYSICS} The ratio of the ion energy density of a plasma to its magnetic energy diversity,or of the particle pressure to the magnetic-field pressure. ^{SCIENCE AND TECHNOLOGY} The second letter of the Greek alphabet; β, B.
随便看	mu phage mural thrombus muramic acid muramidase murbruk structure Murchisoniacea murein muriatic acid Muricacea muricate Muricidae Muridae muriform Murinae murine plague murine typhus murmur muromontite Murphree efficiency Murray code Murray loop test Murray Valley encephalitis murumuru oil musa Musaceae

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