英语词汇“civil twilight”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	civil twilight
释义	civil twilight civil twilight See: twilight. civil twilight civil twilight See twilight. civil twilight [¦si·vəl ¦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. civil twilight A period before sunrise or after sunset, commencing when the sun's center is between 0° and 6° below the horizon. This corresponds to a degree of illumination at which everyday operations begin or cease to be possible without artificial light.
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