最終更新日：2024/08/04
The ancient Egyptians used the Sothic years to determine the length of their calendar.
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The ancient Egyptians used the Sothic years to determine the length of their calendar.
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The ancient Egyptians used the Sothic years to determine the length of their calendar.
The ancient Egyptians used the Sothic years to determine the length of their calendar.
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