barrier
单词辨析：
指在达到目的或前行的过程中必须消除或绕过的障碍（物），可以是具体的或抽象的东西。
Terrorism is an obstacle to peace.
恐怖主义是和平的障碍。
His car hit an obstacle yesterday in the competition.
昨天他的车在比赛中撞上了障碍物。
指做某事的障碍，通常为抽象之物。
They have decided to set a bar to competition.
他们已经决定要设置障碍以阻止竞争。
At that time being a woman was a bar to promotion in this profession.
那时在这一职业中，身为女性便是晋升的障碍。
多指产生阻碍或限制作用的政策、法律、问题等。
The removal of trade barriers means a lot to that country.
贸易壁垒的消除对那个国家而言意义重大。
What remains the biggest barrier to women succeeding at work?
女性取得事业成功的最大障碍是什么？
指堵塞道路、通道、管道等的东西。
There may be an obstruction in the drainpipe.
排水管里可能有阻塞物。
Remove the vehicle that is causing the obstruction.
把造成阻塞的车辆挪走。
相关例句：
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。
The packaging must provide an effective barrier to prevent contamination of the product.
包装必须提供有效的保护，以免产品受污染。
The horse jumped over the wooden barrier.
那匹马跳跃过木头障碍物。
When you get involved in sports and athletes, a lot of the racial barriers are broken down.
当你参与到体育运动中的时候，很多种族隔阂就消失了。
A large crowd crushed past the barrier.
大群的人挤过了障碍物。
In Bermuda, Sam's father took him on an excursion to a coral barrier.
在百慕大，萨姆的父亲带他到附近的珊瑚礁去游玩。