In this paper some universally researched and applied chemical methods of modification are introduced.

文中介绍了几种研究较多并广为应用的对纳米材料进行改性的化学方法。

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The results showed that the two harvest crops' yield of applied straw potassium was approximately equal to that of applied chemical potassium.

结果表明：施用秸秆钾与化肥钾，稻麦轮作制中两季作物总产量基本相当；

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The model method is widely used in chemical materials and chemical teaching, especially applied chemical technology in higher professional institutions.

化学模型方法在化学教材和教学中广泛应用，特别是在高职院校应用化工技术专业相关课程教学中也普遍被使用。

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The products are often applied directly to seeds, which causes the chemical to be contained within the growing plant and protects it from the predation of insect pests.

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