December 2010
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“光速の6分の一の速度の稲妻の落雷時の経路は螺旋だ。 なぜなら、半径のあるシリンダーの表面では螺旋は最短距離だからだ。...”
– 犬のしっぽ ブログ - 稲妻の経路 (via kml)
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