持续的轰击和内部压力使成长中的地球越来越热，导致其内部融化，较重的元素下沉形成地核。
Continued bombardments and internal pressures made the growing Earth hotter, causing its interior to melt and the heavier elements to sink and form Earth's core.
设计时应考虑相关现象的影响，例如下沉，上升，冰冻，融化，腐蚀等。
Where relevant, the design should include the effects of phenomena such as subsidence, heave, freezing, thawing, erosion, etc.
冻土融化时，由于冻土层冰融化和水的自由消散，使土体在自重作用下产生下沉。
In the process of soils thawing, the settlement of soils is induced by the effect of self weight, because of the thawing in frozen layer of soils and the free dissipation of water.
路线的大半是要穿过永冻土，由于存在夏季土层表面融化而导致的下沉危险，这便给运营带来了特殊的挑战。
About half of the route is across permafrost, which poses particular challenges because of the danger of subsidence caused by melting at the surface in summer.
路线的大半是要穿过永冻土，由于存在夏季土层表面融化而导致的下沉危险，这便给运营带来了特殊的挑战。
About half of the route is across permafrost, which poses particular challenges because of the danger of subsidence caused by melting at the surface in summer.
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