But, in exceptional cases, beautiful lawns formed with great deliberation are overwhelmed and obliterated at once by the action of land-slips, earthquake avalanches, or extraordinary floods, just as lakes are.

但是，在特殊情况下，经过深思熟虑形成的美丽草坪会立即被山体滑坡、地震雪崩或特大洪水淹没和摧毁，就像湖泊一样。