It is this thin layer of active soil that supports all living things on the tundra.
正是这被太阳晒暖的苏醒过来的薄薄的一层土壤养活着冻土带上的一切生物。
During the brief summer, a thin layer of frozen soil thaws at the surface.
短短的夏季里，表面很薄的一层冻土融化了。
The regularity and parameter of surface movement aroused by mining under thick soil layer and thin base rock have its obvious characteristic and regularity.
厚松散层薄基岩下开采引起的地表移动规律及地表移动参数，有其明显的自身特点和规律。
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