| 1. | Very open pack ice
全分离流冰
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| 2. | Very close pack ice
密集流冰
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| 3. | Close pack ice
密集块冰
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| 4. | Only a powerful , especially equipped ship could cut away through such tightly - packed ice
只有强大的有特殊装备的船才能穿越如此坚硬的冰。
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| 5. | Animals adapt to changing conditions , which might mean a shift in population patterns to areas where pack ice is morerobust year - round
动物会适应变化的条件，这意味着它们的数量会转移到更加结实的冰盖上去。
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| 6. | Almost nothing grows on their land ; their animals graze on desert bushes ; the people mine ingots of salt from what looks like shimmering pack ice
他们的土地几乎寸草不生；他们在沙漠荒野里放牧牲口；人们从看上去像闪光的浮冰的物质中提炼盐块。
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| 7. | Adelie penguins live on the antarctic continent and on many small , surrounding coastal islands . they spend the winter offshore in the seas surrounding the antarctic pack ice
阿德利企鹅生活在南极大陆和周边许多小岛上。整个冬天他们都会在南极冰盖周围的海上度过。
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| 8. | “ telltale signs are everywhere ? from the unexpected persistence and thickness of pack ice in the waters around iceland to the southward migration of a warmth - loving creature like the armadillo from the midwest
“到处都可以发现证据-从冰岛周围水域积冰的持久和厚度，到喜爱温暖的动物的南迁，如中西部的犰狳。
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