And this phenomenon is not natural - someone or something is causing this to happen.

而这种现象是不自然的——某个人或某事物会导致这一现象发生。

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This long dam is a natural phenomenon.

这条长堤是自然形成的。

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This article deals with the natural phenomenon which is most interesting to everyone.

这篇文章论述的是人人都感兴趣的那种自然现象。

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This article deals with the natural phenomenon which is most interesting to everyone.

这篇文章论述的是人人都感兴趣的那种自然现象。

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