2015年12月6日 星期日

Lenticular cloud, 莢狀雲

Armend Nimani/AFP
A Lenticular cloud
A lenticular cloud forms as white streaks from airplanes mark the blue sky, in a rare atmospheric phenomena above the town of Gevgelija, Macedona. Lenticular clouds have been regularly confused for UFOs throughout history due to the their smooth, round or oval lens-shaped structure
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Lenticular cloud - Wikipedia, the free encyclopedia

莢狀雲

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