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.
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.
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