1N-COUNT 障碍;壁垒;阻碍 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;壁垒;阻碍 [Also + against/between]
Duties and taxes are the most obvious barrier to free trade. [+ to]
2N-COUNT 隔阂;阻碍 A barrier is a problem that prevents two people or groups from agreeing, communicating, or working with each other. 隔阂;阻碍 [Also + between]
There is no reason why love shouldn't cross the age barrier.
爱没有理由不能跨越年龄的阻碍。
She had been waiting for Simon to break down the barrier between them.
她一直在等待西蒙打破他们之间的隔阂。
When you get involved in sports and athletes, a lot of the racial barriers are broken down.
3N-COUNT 关卡;栅栏 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. 关卡;栅栏
The demonstrators broke through heavy police barriers.
示威者们冲破了警察的重重设防。
As each woman reached the barrier one of the men glanced at her papers.
5N-SING 大关;界限 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. 大关;界限
They are fearful that unemployment will soon break the barrier of three million. [+ of]
他们担心失业人数很快将突破300万大关。
The Popular Front failed, as expected, to pass the 5 per cent barrier.