在温带确实是这样，千万年的时间，冰川能沿山坡下磨数英里。
That's true in temperate regions, where glaciers-glacially-flow downhill. Over thousands of years, the frozen masses can scrape miles off of mountains.
冰川深深地雕琢着山谷，一路上慢慢地挫磨着山岩，直至大海。
Glaciers carve the valleys deeper, slowly grinding21 their way toward the sea.
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