free asphalt

例句：

1. 1.The road was in a state of disrepair, with free asphalt everywhere.
   这条道路状况糟糕，到处都是自由沥青。
2. 2.The construction crew used free asphalt to repair the damaged road surface.
   施工队使用自由沥青来修复损坏的道路表面。
3. 3.Free asphalt is often used as an alternative to traditional asphalt for its lower cost and environmental friendliness.
   自由沥青常被用作传统沥青的替代品，因为它成本更低且对环境友好。