常見例句雙語例句This is the vegetational climate of arctic permafrost regions.這是北極永凍地區(qū)的植物氣候。There are 50 years history about subgrade construction technology and the relevant research in the permafrost regions.目前，針對級配碎石力學性能研究較少，在多年凍土地區(qū)的應用研究還是空白。In the past 30 years, the values of freeze-thaw intensity (FTI) exhibited an increasing trend, which indicates that the stability of frozen ground has changed to some extent in the permafrost regions.近30年來高原地區(qū)凍融強度（FTI）呈現增大的趨勢，這在某種程度上表明高原多年凍土區(qū)凍土的穩(wěn)定性發(fā)生了變化； 返回 permafrost regions