The origins of the Yellowstone and SnakeRivers are near each other but on opposite sides of the divide.
黄石河和蛇河的源头互相离得很近，但却在分水岭的两侧。
2
Riverssnake down the mountains.
河流弯弯曲曲地流下山脉。
3
Now, eight major DAMS on the Snake and Columbia Rivers have exacted a toll on the fish in their 900-mile journey to the sea-one of the greatest migrations in nature.