N the material used to make a road 路基材料
Boats could carry heavy weights, but canals could not cross hilly terrain; turnpikes could cross the hills, but the roadbeds could not stand up under great weights.
船可以运载重物，但运河不能穿越丘陵地带；高速公路可以翻山越岭，但路基承受不了巨大的重量。
The whole roadbeds slipped away.
整个路基都坍掉了。
Destruction is caused by landslides to the roadbeds and the underlining parts of the ring expressway surface of Suzhou City.
苏州绕城高速公路因山体滑坡造成路基、路面基层破坏。
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