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嗨! 大家今天過得好嗎? 在天空上時不時看到彩虹，彩虹是氣象中的一種光學現象，當太陽光照射到半空中的水滴經過折射與反射，就會在天空上形成拱形的七彩光譜。台灣曾經有一道彩虹持續時間最久，打破了世界紀錄，威廉考考各位，這道彩虹總共高掛在天空持續多久的時間呢?