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1、
2、 The police put a barrier across the road、警察設了路障。
3、 The police put up barriers to control the crowd、警察設置障礙物，藉以控制人群。
4、 They soon overcame the language barrier、不久他們便克服了語(yǔ)言上的障礙。
5、 Mike was stopped at the barrier because he forgot to show his ticket、麥克在剪票口被攔住了，因為他忘記出示車(chē)票。