柏油路材料

例句：

1. 1.The road was paved with asphalt to make it smoother.
   为了使其更平滑，这条路被铺上了柏油。
2. 2.The asphalt on the road is starting to crack.
   路上的柏油开始裂开了。
3. 3. Asphalt is a popular material for roads because it's durable and easy to repair.
   柏油是道路常用的材料，因为它耐用且易于修复。