文中探讨了不同地质条件下的冻融作用及多年冻结效应。
Frost action and permafrost effects under different geological conditions are considered.
试验表明，两种土经过冻融作用后，其强度参数发生了变化。
It was found that the strength parameters of the two soils changed in an opposite way.
冻融作用和流水作用是新丰沟小流域中最明显的自然地理过程。
The main physical geographical processes are freeze-thaw action and fluviation at the small watershed of the Xinfenggou village.
介绍并简要分析冻融作用对土壤性质的改变及对土壤可蚀性影响的主要研究成果；
Second, main achievements in the freeze-thaw research are introduced and the changes of the property of soil and the soil erodibility affected by freeze-thaw are analyzed .
冻融作用对土壤水分、密度、有机质和土壤的机械组成等因素都有不同程度的影响。
Freeze-thaw action can effect in varying degrees to factors such as soil moisture, density, organic quality and soil machinery composition.
溜砂的主要诱发因素是地表水、地下水、河流冲刷、动荷载作用、风荷载作用、冻融作用、植物及人为因素。
The primary inducing factors of sand-sliding are surface water, ground water, stream erosion, dynamic load action, wind load action, freezing-and-thawing action, plant and man-made factors.
认为土壤胀缩运动主要决定于土壤粘粒的含量，同时季节性冻融作用与干湿交替作用是导致土壤胀缩运动的直接因素。
Moreover, seasonal freezing and melting and seasonal drying and wetting are the direct factors causing soil to expand and contract.
春季风大风多，降雨量少，气候侵蚀力高，地表植被覆盖率低，土壤表层由于冻融作用变的松散，是一年最易风蚀的季节。
The wind erosion hazard is often intensified by the poor vegetation cover and loosen surface soil due to the freezing and thawing over winter.
研究了冻融与磨耗复合作用下的混凝土耐久性能。
The concrete durability under the compound action of freeze-thaw and abrasion is studied.
冻融侵蚀的季节性和侵蚀作用的特殊性，使得国内外对这方面的研究开展很少。
Due to the seasonal freeze thaw erosion and particularity of erosion effect that little research work has been conducted on this aspect both at home and abroad.
上述研究结果说明，冻融交替作用对黑土土壤有机质、氮钾和酶活性产生重要影响。
The above results show that, the effect of alternative freezing and thawing has a great influence on the soil organic matter, soil nitrogen, soil potassium and some soil enzymes.
研究结果表明，冻融交替作用对黑土有机质、氮钾及酶活性产生重要的影响。
The experiments results show that the effect of alternative freezing and thawing has a great influence on the organic matter, nitrogen nutrition, potassium nutrition and soil enzyme activities.
冻融与荷载的共同作用使岩石总损伤加剧，并表现出明显的非线性特征，而其耦合效应使总损伤有所弱化；
The combined effect of freeze-thaw and load in the total damage of rock has obvious nonlinear properties, but the coupling effect will weaken the total damage.
结论经卵巢癌细胞冻融抗原负载dc激活的CTL在体外具有更强的增殖能力和杀伤卵巢癌细胞的作用。
Conclusion CTL activated by DC loaded with freeze-thaw ovarian carcinoma antigen has a higher proliferative ability and effective cytotoxicity against ovarian carcinoma cells in vitro.
结论卵巢癌细胞冻融抗原诱导的CTL在体外具有很强的增殖能力和抗原特异性杀伤卵巢癌细胞的作用。
Conclusion CTL induced by ovarian carcinoma freeze-thaw antigen has high proliferative ability and antigenic specificity against ovarian carcinoma cells in vitro.
应用混合物的连续介质理论，建立了冻融过程中饱和多孔介质的渗流场、应力场和温度场耦合作用的数学模型。
With the application of continuum theory of mixture, a mathematical model for the coupled seepage, stress and temperature for freezing and thawing of water saturated porous media has been established.
冻融交替作用明显地增强土壤中磷酸酶、硝酸还原酶和亚硝酸还原酶的活性。
The effect of alternative freezing and thawing can enhances the activities of some soil enzymes greatly, such as phosphatase, nitrate reductase and nitrite reductase.
冻融过程中土结构受冷生作用的影响，可导致土的工程性质发生变化。
It has become a common understanding that frost action is a kind of weathering process, which considerably changes engineering properties of soils due to cryogenical actions.
应用混合物的连续介质理论，建立了冻融过程中饱和多孔介质的渗流场、应力场和温度场耦合作用的数学模型。
The physical processes involved in freezing and thawing of concrete were simulated in a mathematical model based on thermodynamics and pore-elastic theory.
采用常规混凝土和冻融混凝土为试件，在材料万能试验机上进行了破坏实验，得到了不同荷载作用下超声波的波速。
Conventional and freeze-thawed concrete specimens were detected by a universal test machine. The relationship between supersonic velocity and loading was obtained.
采用常规混凝土和冻融混凝土为试件，在材料万能试验机上进行了破坏实验，得到了不同荷载作用下超声波的波速。
Conventional and freeze-thawed concrete specimens were detected by a universal test machine. The relationship between supersonic velocity and loading was obtained.
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