When hiking, always stay on marked trails and maintain a safe distance from any animals you encounter.

当徒步登山的时候，请一直沿着有足迹的道路行走并且和路上遇到的动物保持一定的安全距离。

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But here was a chance to encounter wildlife, uncaged, within striking distance of the city.

但是在这里有机会看到野生动物，不是关在笼子里的，这是在离城市如此近的地方。

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The furthest distance in the world is not the remotest corners of the globe, but encounter but no dependence.

世界上最遥远的距离不是天涯海角，而是有缘相遇却无缘相依。

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Needless to say this won't be the biggest fight ever, but expect passion, expect a feisty encounter between two British heavyweights who have both gone the distance with the Klitschko brothers in the past year and are still holding out for a rematch.

CNN: July 13, 2012 -- Updated 1727 GMT (0127 HKT)

Chronic hypobaric hypoxia (lack of oxygen): where the expedition will encounter equivalent altitudes up around 3, 800m due to the extreme cold temperatures and distance from the Equator which further decreases atmospheric pressure.

BBC: Viewpoint: The last great polar challenge