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アマゾン川について 3 分以内で解説

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ナイル川はどのようにして上流へ流れていくのでしょうか？

The Nile River for Kids | Facts About The Nile River | Longest River In The World

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Why The Amazon River Has No Bridges

Is The Amazon River On The Brink Of Destruction?

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Discover the World's Most Interesting River: The Amazon!

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ネバド州ミスミ、アマゾン川の源流

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