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》

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》

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。

youdao

Those chosen must come from poor families and must also face at least one barrier to getting a job.

VOA: special.2009.08.20

The other is that this kind of adherence gives the tissue a property that's useful, in this case the property is it can serve as a barrier to nutrients from entering our body.

另外这种黏附,给予组织一种非常有用的属性,这种属性表现为组织成为,营养物质进入身体过程中的屏障

耶鲁公开课 - 生物医学工程探索课程节选

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

这些细胞只有密不透风,才足以形成一道屏障

耶鲁公开课 - 生物医学工程探索课程节选

The existence of innovation-blocking groups has been and continues to be an important barrier to riches.

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This makes exclusive rebate contracts a potentially significant barrier to entry for new competitors.

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There is already a huge barrier to trying something different: the threat of failure.

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