| 1. | This is the vegetational climate of arctic permafrost regions .
这是北极永冻地区的植物气候。
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| 2. | Perhaps this is caused by the sudden melting of subsurface permafrost .
可能是地下永久冻土突然融化所造成。
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| 3. | The harder the material under the permafrost is, the larger the chamber charge required .
永冻层之下的土壤越硬，所需要的药室装药量也越大。
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| 4. | In permafrost areas in the soviet union or canada or alaska, ice has been used effectively for walling and roofing .
在苏联、加拿大或阿拉斯加的永久冻土地区，冰一直很有效地用来做墙和屋顶。
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| 5. | Heat - bar construction technique on permafrost areas
多年冻土地区热棒施工技术
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| 6. | As permafrost gets warmer , it could become wetlands
永久冻土变得更加温暖时，将变成湿地。
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| 7. | Stability of gas hydrate in permafrost
冻土带天然气水合物稳定性研究
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| 8. | Distribution and characteristic of permafrost of hei longjiang privince
黑龙江省多年冻土分布特征
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| 9. | Effect of temperature control on tunnel construction in permafrost
温度场控制在多年冻土隧道施工中的作用
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| 10. | This was a challenge , because the permafrost is barely permanent
这是一大挑战，因为这里的冻土并非永久不变。
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