名词
中文翻译：次要的粘土层
同义词：
['subordinate clay', 'secondary sedimentary layer']
例句：
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1. Thegeological survey revealed that the primary clay was overlain by a secondary clayified horizon.
地质调查发现，主要的粘土层被次要的粘土层覆盖。
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2.The study of this region's soil composition is crucial for understanding the secondary clayified horizon's role in soil formation.
研究该地区土壤成分对于理解次要粘土层在土壤形成中的作用至关重要。
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3.The secondary clayified horizon plays a significant role in the regional climate regulation.
次要粘土层在区域气候调节中起着重要作用。