名词
中文翻译：自然形成
同义词：
['natural growth', 'natural development例句：1. The geological formations of the region are fascinating.（该地区的地质构造令人着迷。）']
例句：
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1. The geological formations of the region are fascinating.
该地区的地质构造令人着迷。
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2. The formation of the new city is expected to be completed within a year.
新城市的建设预计将在一年内完成。
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3.The formation of the ocean is a complex process involving many factors.
海洋的形成是一个复杂的过程，涉及许多因素。