名词
中文翻译：沉积
同义词：
['accumulation', 'accumulation', 'sedimentation']
例句：
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1. The soilis undergoing aggradation as the rainwater washes away the topsoil.
随着雨水冲刷，表层土壤正在积累。
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2. The river has been accumulating silt for years due to over-abstraction of water.
由于过度抽取水资源，河流已经积累了多年的泥沙。
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3.The scientist observed that the ocean was undergoing aggradation due to climate change.
科学家观察到，由于气候变化，海洋正在积累。