obstructor

例句：

1. 1. The construction of the new bridge was a major obstacle to their plans.
   新桥的建设对他们的计划构成了重大障碍。
2. 2.The government's decision to cut funding for renewable energy was seen as an obstruction to progress.
   政府决定削减对可再生能源的资金支持，被看作是阻碍进步的行为。
3. 3. The road was blocked by a large truck, making it impossible for anyone to get through.
   一辆大型卡车堵住了路，使得任何人都无法通过。