单词Beginning Evening Nautical Twilight 释义SeeBENT 英汉缩略语词收录了1186255条英文缩写词条,提供最新英文缩写(缩略词)查询及其意思解释,包括月份的英文缩写,有限公司英文缩写等英文缩略词。
There, at midnight local time in midsummer, the sun is only 12 degrees below the horizon, still in nautical twilight. The situation is not as bad in the Southern Hemisphere, as there are only a handful of cities south of 45 degrees south. So what do northern astronomers do in the ...