The risk of transmission of BSE to humans who eat farmed fish would appear to be low because of perceived barriers between species.

由于之前所认为疯牛病在物种之间存在壁垒，所以认为对人类吃养殖鱼类而被传播疯牛病的危险似乎是很低。

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These barriers can inhibit competitors from getting traction, becoming visible, and being perceived as authentic or credibility. As a result, they may be weak players for a long time.

这些障碍能禁止竞争者，结果，很长时间内他们可能是弱者。

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Obese children suffer a number of physical and perceived physical barriers to living an active lifestyle, which can perpetuate a cycle of inactivity and poor health.

过度肥胖的儿童对于拥有一种积极的生活方式有大量身体和身体感知障碍，这样造成长期保持一种不积极、不健康的生活方式。

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She identified the four major barriers for women: cost, culture, technical literacy and perceived lack of need.

FORBES: Connect