block V-scan

例句：

1. 1.The police blocked the road to prevent traffic jams.
   警察封锁了道路以防止交通堵塞。
2. 2. The construction workers blocked the path to keep the workers safe.
   建筑工人封锁了路径以确保工人的安全。
3. 3. The firefighters blocked the exit as they rushed to the scene.
   消防员封锁出口，因为他们冲向现场。