obstructions in thinking

例句：

1. 1. The constructionof the new bridge has caused several obstructions to traffic.
   新桥梁的建设导致交通受阻。
2. 2. The road was blocked by alarge truck, preventing cars from entering thecity.
   一辆大型卡车堵住了道路，阻止了汽车进入城市。
3. 3. Thecompany's decision toinvest in renewable energy sources hasbeen met with some obstructionsfrom environmental groups.
   公司决定投资可再生能源的决定遭到了一些环保组织的反对。