overhead obstruction

• 架空障碍物

overhead obstruction的用法和样例：

例句

1. I saw an obstruction in the road.
   我发现路上有一障碍物。
2. The derailment, according to Transport of London, was reportedly caused by an obstruction on the tracks.
   据英国交通警方说地铁的脱轨是轨道上的障碍物导致的。