英语词汇“drake equation”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	drake equation
释义	Drake equation Drake equation [′drāk i‚kwā·zhən] (astronomy) An equation which gives the number of advanced technological civilizations curently active in the Galaxy as the product of the rate at which new stars are born in the Galaxy, the probability (actually a product of probabilities) that any one of these stars will possess the necessary conditions for life to originate and to slowly evolve to a technological civilization, and the average longevity of such civilizations.
随便看	relative air humidity relative air speed relative altitude relative amount to sulfur relative amplitude of accommodation relative analgesia relative angle change relative aortic valve area relative aperture relative area under disease progress curve relative area under the absorption curve relative area under the lesion expansion curve relative arrival time technique relative atomic mass relative atomic masses relative attenuation relative autonomy relative average deviation relative azimuth relative bandwidth relative based value units scale relative bearing relative bearing indicator relative-bearing indicator relative bed rest

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Drake equation