medium tar

例句：

1. 1.The road was in poor condition due to the recent heavy rains.
   由于最近大雨，这条道路的状况很差。
2. 2. The construction crew used medium tar to repair the damaged bridge.
   施工队使用中等沥青来修复损坏的桥梁。
3. 3.The oil company is looking into using medium tar for their new pipeline project.
   这家石油公司正在考虑使用中等沥青来建设他们的新管道项目。