1、
2、 The police put a barrier across the road、警察设了路障。
3、 The police put up barriers to control the crowd、警察设置障碍物，藉以控制人群。
4、 They soon overcame the language barrier、不久他们便克服了语言上的障碍。
5、 Mike was stopped at the barrier because he forgot to show his ticket、麦克在剪票口被拦住了，因为他忘记出示车票。