Many factors can cause lawn hollow and hole, such as soil terrene, construction technology or force majeure and man-made factors, in which soil terrene is the main and direct factor.
导致草坪凹陷、坑洼的因素是多方面的，有土壤土质因素、施工技术因素以及其他因素，如不可抗力和人为因素等，其中土壤土质因素为主要和直接因素。
Many factors can cause lawn hollow and hole, such as soil terrene, construction technology or force majeure and man-made factors, in which soil terrene is the main and direct factor.
导致草坪凹陷、坑洼的因素是多方面的，有土壤土质因素、施工技术因素以及其他因素，如不可抗力和人为因素等，其中土壤土质因素为主要和直接因素。
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