单词：roadblock
roadblock的用法和样例：
例句
- There was no sign of a roadblock.那儿没有设置路障的迹象。
- The police had set up a roadblock and waved several drivers down.警方设下路障并挥手示意几位司机停车。
- His car was swerved to avoid bumping against the roadblock.为了避免撞上路障,他把车打了个急转弯。
- Anytime they could set up a roadblock in our way.他们随时都可能设置障碍来阻碍我们。
- obstruction障碍
- barricade【C】路障
- barrier栅栏
- blockade【C】封锁
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