季节性冻土区
seasonal frozen soil region
The seasonal frozen soil region
季节冻土层
seasonal frozen soil layer
季冻区公路
Highways in seasonal frozen region
热带北半球夏季季节内振荡(BSISO)
boreal summer intraseasonal oscillation(BSISO) over tropics
冻土冻胀试验
Frozen soil frost heave experiment
多年冻土区
permafrost
frozen ground for many years
permafrost regions
permafrost area
permafrost region
multi-year tundra
permafrost zone
多年冻土区路基
subgrade in permafrost soil zone