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spherical coordinates
Author:
Wu Xiao-Ren
GeoGebra
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龙形曲线-分形龙
科氏力 (Coriolis Force)
折扣
百分數及其應用
平行線的判定
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pyuytuytuty
Apollonius Problem 10 CCC wiki step 3
千年曆
座標網格的複數映射
正三角形堆垛