barrier

The police placed a metal barrier across the street to control the crowd.

(Chinese) 警察在街道上放置了金属障碍物以控制人群。

The Great Barrier Reef acts as a natural barrier protecting the coast from heavy waves.

(Chinese) 大堡礁起到了天然屏障的作用，保护海岸免受巨浪冲击。

The lack of a common language was a major barrier to the success of the negotiations.

(Chinese) 缺乏共同语言是谈判成功的主要障碍。

The high cost of tuition remains a significant barrier for many students seeking higher education.

(Chinese) 高昂的学费依然是许多追求高等教育的学生面临的主要障碍。