obstruction to an extension

例句：

1. 1.The construction of the new bridge has caused significant obstructions to traffic.
   新桥梁的建设对交通造成了重大阻碍。
2. 2.The road was blocked by a large tree that fell across it.
   一条道路被一棵倒下的大树阻塞了。
3. 3. The government's decision to block the import of foreign goods has raised concerns among businesses.
   政府决定阻止进口外国商品，引起了商业界的担忧。