The continual freezing and expanding, melting and submerging and melting and sinking of roadbed are the main problem on the building and maintaining of road in frozen earth area.
路基周而复始的冻胀、融沉和热融滑塌是冻土地区道路建设和维护所面临的主要难题。
The sinking sound of melting snow is heard in all 6 dells, and the ice dissolves apace in the ponds.
山谷里处处可闻融雪的沉坠声；湖泊里的冰雪大片大片地融化。
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