北方大陆的大部分地区曾为厚达3公里的大量冰层所覆盖。
Much of the northern lands were covered by vast ice sheets that reached a thickness of as much as 3 kilometers .
前苏丹石油生产设施的3/4都在现在的南部苏丹境内，但是这个新国家属于封闭大陆地区，需要北方的输油管道把石油输往全世界。
Three-quarters of the former Sudan’s oil production is now located in South Sudan. But the new country is landlocked, and needs the north’s pipelines to send its oil to the world.
北方森林是横贯大陆的。
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