permafrost

permafrost的英语例句

1. 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.

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

   这是北极永冻地区的植物气候.

3. 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.