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1.The agricultural scientist has developed a modified loess that can help farmers increase crop yields.
这位农业科学家开发了一种改良的黄土，可以帮助农民提高作物产量。
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2. The city's construction project has significantly improved the quality of its modified loess.
该城市的建设项目显著提高了其改良黄土的质量。
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3.The research on modified loess is crucial for understanding the impact of human activities on soil quality.
对改良黄土的研究对于理解人类活动对土壤质量的影响至关重要。