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極付近の曲率に沿う円の方が、赤道付近の曲率に沿う円より半径が長いので、緯度差1°あたりの子午線の弧の長さも高緯度地方の方が低緯度地方よりも長い
地学
Optimized studying based on the forgetting curve vastly improves memorization. - What is reminDO? Memorize
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