“apparent magnitude”的概念、定义、翻译、参考文献-科学参考

单词	apparent magnitude
释义	apparent magnitude [ǝ`pa·rǝnt `mag·nǝ´tüd] ^ASTRONOMY An index of a star's brightness relative to that of the other stars; it does not take into account the difference in distance between the stars and is not an indication of the star's true luminosity.
随便看	directivity index directivity pattern direct keying device direct labor direct labor standard direct-line drive directly heated cathode direct material direct memory access direct motion direct nuclear reaction direct numerical control director director circle direct organization director-sight system director-type computer director-type fire control directory direct outward dialing direct pickup direct piezoelectricity direct plate exposure direct pointing direct point repeater

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