- to create a gigantic canyon.
形成一个巨大深邃的峡谷 - It's over a mile deep
它的深度超过1英里 - and at its widest it's 17 miles across.
最宽的地方达17英里 - The Grand Canyon.
这就是大峡谷 - This river has cut the world's longest canyon system -
这条河冲蚀出了世界上最长的峡谷系 - a 1,000 mile scar clearly visible from space.
在太空中也能清楚地看到 这条长达1000英里的沟壑 - As rivers leave the mountains behind,
河流离开山区之后