seasonally frozen ground

基本解釋

In seasonally frozen ground regions as well as permafrost regions, active layer is the most active terrane in terms of thermodynamics.
活動層夏季融化、鼕季凍結(jié)的近地表土（巖）層，是凍土地區(qū)熱力動態(tài)最活躍的巖層，在凍土研究中有著重要意義。
It is shown from the results that seasonally frozen ground evidently influences site dynamical characteristics and seismic security of tank.
結(jié)果表明：季節(jié)性凍土層的存在明顯地影響著場地動力特性，進(jìn)而影響儲罐的抗震安全性。
Water migration and variation in subgrade soils is the most active and live factor to the road frost damage in seasonally frozen ground regions.
在季節(jié)凍土區(qū)，路基水分遷移變化是道路凍害最積極活躍的因素。