obstacle/bar/barrier/obstruction.导航词义：障碍

1. obstacle:n. 障碍（物）.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。

2. bar:n. 障碍，妨碍.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。

3. barrier:n. 障碍，壁垒.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？

4. obstruction:n. 障碍物，阻塞物.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。

全部

1·I realized I had to surmount the language barrier.

我认识到我必须得克服语言障碍。《柯林斯英汉双解大词典》

2·The Yangtze river is a natural barrier to the north-east.

长江是东北方向的一道天然屏障。《牛津词典》

3·Ozone is the earth's barrier against ultra-violet radiation.

臭氧是地球防止紫外线辐射的屏障。《牛津词典》

4·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。《柯林斯英汉双解大词典》

5·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。《柯林斯英汉双解大词典》

6·There was no real barrier between reality and fantasy in his mind.

在他的头脑中，现实与幻想之间没有真正的界线。《牛津词典》

7·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。《柯林斯英汉双解大词典》

8·No matter what a woman tries to do to improve her situation, there is some barrier or attitude to keep her down.

不管女性如何试图改善自己的境遇，总有障碍或看法压制她们。《柯林斯英汉双解大词典》

9·Twenty years ago, some barrier free facilities were built.

二十年前建成了一些无障碍设施。

10·It is the greatest barrier to building a farm of their own.

这是他们建立自己的农场所面临的最大障碍。

障碍

1·I realized I had to surmount the language barrier.

我认识到我必须得克服语言障碍。《柯林斯英汉双解大词典》

2·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。《柯林斯英汉双解大词典》

3·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。《柯林斯英汉双解大词典》

4·No matter what a woman tries to do to improve her situation, there is some barrier or attitude to keep her down.

不管女性如何试图改善自己的境遇，总有障碍或看法压制她们。《柯林斯英汉双解大词典》

5·It is the greatest barrier to building a farm of their own.

这是他们建立自己的农场所面临的最大障碍。

屏障

1·The Yangtze river is a natural barrier to the north-east.

长江是东北方向的一道天然屏障。《牛津词典》

2·Ozone is the earth's barrier against ultra-violet radiation.

臭氧是地球防止紫外线辐射的屏障。《牛津词典》

3·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。《柯林斯英汉双解大词典》

4·This cell can only be an effective barrier if there's no way to get past it.

这个细胞只有在无法通过时才能成为有效的屏障。

5·Because early Earth lacked oxygen in its atmosphere, it also lacked a protective ozone barrier.

因为早期的地球大气中缺乏氧气，所以也缺乏起保护作用的臭氧层屏障。

壁垒

1·Another would be raising the barrier for acceptance of a bid from 50% plus one vote to 60%.

另一个方法是提高接受收购的壁垒，从原来的50%多一票提高到60%的票数。

2·Not every request or barrier has a sinister motive.

不是每个请求或壁垒都有邪恶的动机。

3·Yet others are not that generous with their data, which is the third barrier.

然而其它一些机构对自己的数据也并非如此慷慨，这也即是第三种壁垒。

4·Beyond language barriers, there exists an insurmountable artistic preference barrier.

除了语言障碍，还有不可逾越的文化壁垒。

5·Given the high food prices around the world and the need for poor people to lower their cost of food, it just does not make sense for the Doha negotiations to founder upon this barrier.

鉴于全世界粮食价格偏高且贫困人口要求降低食品成本，如果多哈回合因这一壁垒而失败，就显得毫无疑义了。

垒

1·The fission barrier parameters for actinide nuclei were obtained by analysis and calculations of fission cross-sections and complete neutron reaction cross sections.

通过分析和计算锕系核裂变截面和全套中子反应截面获取了一组锕系核的裂变位垒参数。

2·It is found that the conductance depends strongly on the shape of the magnetic barrier.

我们发现，磁结构的电导强烈地依赖于磁垒的形状。

3·In this paper, the reflexed coefficient of potential barrier of period is calculated by the method of character matrix.

应用特征矩阵方法计算周期势垒的反射系数，所得结论与文献结果一致，但计算方法较为简单，并且便于计算机处。

4·A semiconductor fast neutron spectrometer consisting of a Au-Si surface barrier detector and a conical polyethylene foil radiator is described.

本文描述了一个由金硅面垒型探测器和锥形面聚乙烯薄膜辐射体所组成的快中子谱议。

5·Some treatment parameters led to boron carbon coating above the boride layer which ACTS as a diffusion barrier and prevents a further growth of the boride layer.

一些处理参数会导致在硼化物层上形成硼-碳层，它将起着扩散垒的作用，阻止了硼化物进一步的生长。

障

1·Teams of ships have skimmed up millions of barrels of oily water, and unfurled miles of barrier boom.

“清油舰队”已撇去数百万桶油水，并铺设了几英里长的拦障。

2·When gardens are planted directly on the roof, a waterproof membrane is laid down first, followed by insulation and a root barrier.

当花园直接种植在屋顶上，防水膜放在最下层，其次是隔热和根障。

3·This study provides proof that barrier islands exist in every climate and in every tide-wave combination, said Pilkey, a coastal geologist.

“这项研究证明障壁岛存在于每种气候环境和每种潮汐波组合，”海岸地理学家Pilkey说。

4·Carob extract added as a light barrier.

卡罗伯提取新增为光障。

5·The mountain barrier to the west of this tarim basin is high.

塔里木盆地西边的山障是很高的。

障碍物

1·It appears a Ferrari has collided with a barrier in the tunnel.

一辆法拉利似乎和隧道中的障碍物发生了碰撞。

2·Tryptophan has to fight with other amino acids to cross the blood-brain barrier and get into the brain.

色氨酸必须打败其他的氨基酸，才能通过血管-大脑的障碍物，到达大脑。

3·Each fish that had been spawned in the normal water consistently preferred to turn either right or left every time it reached the barrier, a sign of handedness.

那些在正常海水中长大的鱼苗遇到前方障碍物时，要么总是向左转，要么总是向右转，就像左撇子或者右撇子一样。

4·I am asking you to have to courage to plow thought this barrier of limitation and remember the totality of who you are, to live in your own personal integrity.

我要求你们鼓起勇气去艰苦前进，穿过这个局限性的障碍物，回忆起我们全体是谁，去活在你们自己个人的完整性内。

5·The horse jumped over the wooden barrier.

那匹马跳跃过木头障碍物。

势垒

1·The additional upper state is created by a first quantum well adjacent to the injection barrier.

新增高能态是通过注入式势垒旁第一个量子阱来创建的。

2·And what the probability is of their getting enough energy to go over the barrier.

还有他们具有，一定能量克服势垒的概率。

3·Vary temperature, barrier height, and potential energies.

不同的温度、势垒高度和潜能。

4·It is found that the double quantum wires coupled by a finite barrier can be an energy filter and current divider.

我们发现通过有限势垒耦合的双量子线在磁调制下可以用作为电子能量过滤器和分流器。

5·The experimental results were compared with the permeation rate of pure cu and Be, a discussion on the function of the surface barrier was also made.

实验结果与纯铜和纯铍的渗透率相比较，并按照氧化铍的表面势垒作用对渗透行为的影响进行了讨论。

栅栏

1·A train from New Jersey ploughed into the barrier at the end of the track.

从新泽西驶来的一辆火车撞上了轨道尽头的栅栏。《柯林斯英汉双解大词典》

2·The horse ran over the barrier easily.

马儿轻易地越过了栅栏。

3·The railroad barrier won't go up.

铁道平交道口的栅栏没有上去。

4·Volvo's steel cargo barrier, however, is a bit pricier: $345.

而沃尔沃的钢化栅栏则有些昂贵，高达345美元。

5·The barrier around the pen is about 5 feet tall, but on the other side is a drop of 9 to 10 feet, and Zhang says he could not climb out.

围栏周围的栅栏大概有5尺高，但那对面的熊猫池足足有9-10尺深，Zhang说他根本没法爬出去。

障壁

1·Still, the new discovery and new classification of barrier islands around the Arctic Ocean is an eye-opener.

关于北冰洋周围障壁岛的新发现和新分类仍然是令人惊讶的。

2·Barrier islands are important to the Gulf ecosystem: They protect the marshes from ocean storms and erosion.

障壁岛群对海湾生态系统很重要：它们保护沼泽地免除海洋风暴的袭击和侵蚀。

3·The blood-brain barrier - which stops most things in the blood stream from crossing to our brains - is much too great an obstacle.

血脑障壁更是重大障碍，它有着阻止血液中许多物质进入我们大脑的作用。

4·The presence of sea ice and of permafrost helps protect Arctic barrier islands for much of the year.

海冰和冻土层的出现很多年来帮助保护了北极障壁岛。

5·Barrier islands in the Arctic are half as long (5 kilometers, or 3 miles) as the global average (10 kilometers or 6 miles).

北极地区的障壁岛长(5公里，或3英里)是全球平均长度(10公里或6英里)的一半。

(1)trade barrier贸易壁垒

(1)language barriern. 语言障碍

(1)barrier reef堡礁；堤礁

(1)thermal barrier热障；保温层；绝热层

(1)great barrier reef大堡礁

(1)blood-brain barrier血脑屏障；血脑障壁