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The reason for this is easy to recognise: in nature, the existent organisms either adapt or are regularly replaced by new types.

原因很容易理解：在自然界中，现存的生物要么适应环境，要么被新物种取代。

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In the world of animals in nature, the young may not be so lucky or easy to find a foster parent if their parents die or lose the ability to raise them.

在大自然的动物世界中，如果幼崽的父母死亡或失去了抚养的能力，幼崽们可能不会那么幸运或轻易地找到养父母。

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But it was easy to do because they were so knowledgeable now of focusing on nature.

但这其实很容易,因为他们已经学会如何欣赏自然。

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Monsanto is about patents, but particularly about cutting-edge technologies and products that are by nature easy to copy.

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"Offences of this nature are easy to commit but very difficult and very expensive to detect, " he said.

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As you travel through its canyons, it's easy to forget that nature even exists, let alone that we're part of it.

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