permafrost是什么意思

实用例句

1. 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.来自辞典例句

2. This is the vegetational climate of arctic permafrost regions.

这是北极永冻地区的植物气候.来自辞典例句

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.来自辞典例句

4. It became entombed in the permafrost, where it remained until recently freed.

它被掩埋在永久冻土层里, 直到最近才被挖掘出来.来自互联网

5. An example of a tipping point is the thawing of the permafrost.

“气候引爆点”的一个例子就是永久冻土层的融化.来自互联网