1·The Sami has long used the tents as portable shelters—their wide bases and forked poles enable them to withstand the winds on the Arctic tundra.
长期以来，萨米族人一直把这些帐篷用作便携式避难所——宽大的底部和叉状的支杆使它们能够承受住北极冻原上的大风。
2·The arctic tundra is at the top of the world around the North Pole.
北极冻原是指北极点周边的地区，是世界最高的地方。
3·Oil, for example, even when buried under hundreds of feet of environmentally protected Arctic tundra.
在环境尚未破坏的极地苔原，他们嗅到了埋藏地下几百英尺深处传来的石油芬芳；
4·Brilliant day for a hike on the arctic tundra, surprisingly alive with flora, as well as reindeer and arctic fox.
在北极苔原上徒步旅行了明朗的一天，那里洋溢着令人惊讶的植物群以及驯鹿和北极狐狸。
5·The climate gradually takes changes from subtropics, temperate zone, cool temperature zone and arctic tundra.
气侯从亚热带、温带、寒温带到亚苔原带逐渐变化。
6·Farthest travelled is the red knot, which breeds on the high Arctic tundra and winters as far away as South Island, New Zealand.
红鹬是能飞得最远的一种鸟。冬天，它在高北极苔原产卵，然后飞往新西兰南岛。
7·Only small villages are thinly scattered in this remote and inhospitable region of Arctic tundra bordering the Beaufort Sea.
这里与波弗特海接壤，偏远荒凉的地带稀疏地散落着几座小村庄。
8·The Phoenix's 90-day mission is to analyze the soils and permafrost of Mars' arctic tundra for signs of past or present life.
凤凰号90天的任务就是分析火星北极冻土的土壤和永久冻土带，看他们在过去和现在是否有生命存在的信号。
9·Sami have long used the tents as portable shelters—their wide bases and forked poles enable them to withstand winds of up to 50 miles an hour on the Arctic tundra.
长期以来，萨米族人一直把这些帐篷用作便携式避难所——宽大的底部和叉状的支杆使它们能够承受住北极冻原上每小时多达50英里的大风。
10·Global warming heats up the Arctic twice as fast as the rest of the world, meaning Alaska's tundra stands to vanish if temperatures continue to rise.
全球变暖使得北极升温的速度是世界其他地区的两倍，这意味着如果气温继续上升，阿拉斯加苔原将消失。