permafrost

音標發(fā)音

adj性質(zhì)的同根詞
permanent：永久的，永恒的；不變的。
adv性質(zhì)的同根詞
permanently：永久地，長期不變地。
n性質(zhì)的同根詞
permanent：燙發(fā)（等于permanen ave）。
permanence：持久；永久。
permanency：永久；耐久性；永久的事物。

Perhaps this is caused by the sudden melting of subsurface permafrost.
可能是地下永久凍土突然融化所造成.
This is the vegetational climate of arctic permafrost regions.
這是北極永凍地區(qū)的植物氣候.
The harder the material under the permafrost is, the larger the chamber charge required.
永凍層之下的土壤越硬, 所需要的藥室裝藥量也越大.
Perhaps this is caused by the sudden melting of subsurface permafrost.
可能是地下永久凍土突然融化所造成.
The harder the material under the permafrost is, the larger the chamber charge required.
永凍層之下的土壤越硬, 所需要的藥室裝藥量也越大.

多年凍土
Patchy permafrost is ede of vast and continuous permafrost zone which is degrading, it is discontinuous horizontally.
島狀多年凍土是大片連續(xù)多年凍土退化的邊緣地帶，具有平面上不連續(xù)特點。
土木建筑工程
多年凍土
Finally, the reasonable design parameters were provided to the project, and the investigation was significant to the design of the thermosyphon foundation in the permafrost region in China.
最終,為該工程取得了合理的設計參數(shù)。以上工作將對多年凍土地區(qū)熱樁基礎的設計有重要的參考價值。
地球科學
多年凍土
永凍區(qū)
永久凍結
永久凍土
永凍
永凍土