分类指标
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indicators for classification
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Classification standards of indicators for soil quality evaluation were put forward and the situations of soil property of Hebei Plain were discussed.
提出了河北平原土壤质量评价指标的分级标准，依据该标准对河北平原典型土壤样品进行了单因素评价。
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