permafrost
英 [ˈpɜː.mə.frɒst]
美 [ˈpɝː.mə.frɑːst]
- n. 永久冻土，永久冻地；永久冻结带；永久冰冻
中文词源
permafrost 永冻土
缩写自permanent frost.
英语词源
- permafrost (n.)
- 1943, coined in English by Russian-born U.S. geologist Siemon W. Muller (1900-1970) from perm(anent) frost.
权威例句
- 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.
- 2. This is the vegetational climate of arctic permafrost regions.
- 这是北极永冻地区的植物气候.
- 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.
- 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.
- 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.