日出與日落 - 颱風討論

By Mary
at 2009-04-19T15:20
at 2009-04-19T15:20
Table of Contents
大家好
我想請問,
在太陽真正升起多久以前,天空已經開始濛濛亮?
又太陽下山後,平均多久才會天黑 ? (是否有統計資料)
如果我已經知道日出及日落的時間,
我是不是可以概略的分出清晨,白天,黃昏,夜晚?
這問題可能有點笨,但還是希望板上的強者可以回答我。
謝謝大家。
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颱風
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