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(xué)性能研究較少，在多年凍土地區(qū)的應(yīng)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(qiáng)度（FTI）呈現(xiàn)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