“civil twilight”的概念、定义、翻译、参考文献-科学参考

单词	civil twilight
释义	civil twilight [¦si·vǝl ¦twī´līt] ^ASTRONOMY The interval of incomplete darkness between sunrise (or sunset) and the time when the center of the sun's disk is 6° below the horizon.
随便看	mill finish mill-head ore milli- milliammeter milliampere milliampere-second millibar millibarn millicurie-destroyed millicurie-of-intensity-hour millicycle millidarcy milliequivalent millier millifarad milligal milligauss milligram milligram-hour millihenry millihertz millihg milli-inch milli-k Millikan meter

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