関連ワード:  how deep is the amazon river in feet    how long is the amazon river in feet    how deep is the amazon river in miles    how big is the amazon rainforest in feet    how long is the amazon rainforest in feet    how long is the amazon river in miles    how big is the amazon river in miles    how big is the amazon rainforest in square feet    how long is the amazon river in miles and kilometers    how long is the amazon river in square miles