permanently frozen ground

常见例句

Slowly the carcass, more than four times the weight of a bull elephant, appears onto the ice to be cut up, dragged to the village and stored in pits in the permanently frozen ground.
慢慢地，这头比四头公象还要重的鲸鱼一点点被拉到了冰面上，然后，被分割成小块，运到村里，储藏在永久冻土下的洞里。
When this normally permanently frozen ground thaws, the water in the lakes can seep through the soil, draining the lake.
当这种正常的永久冻土层融化后，湖水可以渗进土壤，排空湖泊。
hbslfb.blog.163.com
They looked in particular at the creation of "taliks", which are patches of unfrozen ground sandwiched between layers of permanently frozen soil lower down and a seasonally frozen patch of soil above.
他们尤其考量了位于底层永久冻结土壤和上层季节性冻结土壤之间的居间不冻层的形成。
env.people.com.cn