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。
2
The whole roadbeds slipped away.
整个路基都坍掉了。
3
Destruction is caused by landslides to the roadbeds and the underlining parts of the ring expressway surface of Suzhou City.