barrier

1. N-COUNT A barrier is something such as a rule, law, or policy that makes it difficult or impossible for something to happen or be achieved. 障碍

Duties and taxes are the most obvious barrier to free trade. 关税及其他各种税是自由贸易最明显的障碍。

2. N-COUNT A barrier is a problem that prevents two people or groups from agreeing, communicating, or working with each other. 障碍; 隔阂

There is no reason why love shouldn't cross the age barrier. 爱情没有理由不应跨越年龄障碍。

She had been waiting for Simon to break down the barrier between them. 她一直在等着西蒙来破除他们之间的隔阂。

3. N-COUNT A barrier is something such as a fence or wall that is put in place to prevent people from moving easily from one area to another. 栅栏; 围墙

The demonstrators broke through heavy police barriers. 示威者们冲破了警方的重重关卡。

4. N-COUNT A barrier is an object or layer that physically prevents something from moving from one place to another. 屏障

A severe storm destroyed a natural barrier between the house and the lake. 一场猛烈的暴风雨摧毁了房屋和湖泊之间的天然屏障。

5. N-SING You can refer to a particular number or amount as a barrier when you think it is significant, because it is difficult or unusual to go above it. (数量) 大关

They are fearful that unemployment will soon break the barrier of three million. 他们担心失业人数不久将突破300万大关。