名词短语
中文翻译：结合的聚合体
同义词：
['Combined Gradation', 'Combined Gradient', 'Combined Gradational', 'Combined Gradational Scale', 'Combined Gradational Range']
例句：
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1. The combined gradation of the materials was carefully analyzed to determine the optimal mix for the project.
对材料组合进行了仔细分析，以确定项目的最佳配比。
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2. The combined gradation of the soil samples was used to predict the potential yield of the crops.
土壤样本的结合梯度被用来预测作物的潜在产量。
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3. The combined gradation of the sediments in the river was studied to understand its impact on the environment.
研究了河流中沉积物的结合梯度，以了解其对环境的影响。