the ratio of obstruction

例句：

1. 1.The road was blocked by a large tree.
   路上被一棵大树堵住了。
2. 2. The constructionof the new bridge will cause significant obstructions to traffic.
   新桥的建设将严重阻碍交通。
3. 3. The company's decisionto invest in renewable energy has been metwith strong opposition from environmentalists.
   该公司决定投资可再生能源，遭到了环保人士的强烈反对。