那里也是驯养北美驯鹿的地方，也是某些地区例如阿拉斯加的北坡的重要生计来源。
The tundra is also home to caribou, an important source of sustenance in regions such as Alaska's North Slope.
沙洲把楚科奇海划分为两个部分，左侧是从Kasegaluk泻湖，右侧是靠近近美国的阿拉斯加的北坡。
A sandbar divides the Chukchi Sea, at left, from the Kasegaluk Lagoon, right, near North Slope, Alaska.
阿拉斯加的北坡掩埋着许多恐龙骸骨，但是它们被永远难以穿透的冻土层包住了，就像是被困在一个冰冷的坟茔里。
On Alaska's north slope there are dinosaur bones, lots of them. But they're trapped in an icy tomb - an impenetrable wall of permafrost.
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