We've been talking about the decline of coral reefs in tropical areas all over the world—how natural and man-made stresses are causing them to degrade or in some cases, to die.

我们之前提到了世界各地热带地区中珊瑚礁的衰落，即自然和人为（造成的）压力是怎样造成珊瑚礁退化，或者甚至在某些情况下，造成它们死亡的。

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Finally, we know that language changes over time, which is natural and normal if a language is to survive.

最后，我们知道语言会随着时间而变化，如果一种语言要生存下去，这是自然且正常的现象。

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Man has dominion over the natural world.

人类拥有对自然界的统治权。

《牛津词典》

They cite Russia's brief war with Georgia and Russia's confrontations with Ukraine over natural gas supplies last year as reasons to remain skeptical about the Kremlin's intentions.

VOA: standard.2009.09.17

The integral of one over a quantity is the natural log.

这种形式的积分结果,是自然对数。

麻省理工公开课 - 热力学与动力学课程节选

The emphasis on the individual is just another way of saying, again unlike Aristotle, that no one has natural authority over anyone else.

个体的重点在于,与亚里士多德所说不同，没有人拥有高于他人的自然权威。

耶鲁公开课 - 政治哲学导论课程节选

The world's richest brothers have fought bruising court battles in the past over natural gas interests.

BBC: India's Ambani brothers sign deal on telecoms

The proposal has thrown Bolivia, already rent by blockades and bitter disputes over natural resources, into further turmoil.

ECONOMIST: Bolivia

The big idea behind Watson is evidence based reasoning over natural language content.

FORBES: Build Your Own Watson with Open Source Software