名词
中文翻译：自然过渡
同义词：
['natural evolution', 'natural development', 'natural progression']
例句：
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1.The process of natural gradation is crucial for the ecosystem's health.
自然过渡过程对生态系统的健康至关重要。
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2.The species undergoes a natural gradation from aquatic to terrestrial life.
该物种从水生生活自然过渡到陆生生活。
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3. The study of natural gradation has led to new insights into the origins of life on Earth.
研究自然过渡为地球生命起源提供了新的见解。