以下为句子列表：
英文: According to the configuration and ecotope of the earths surface, the coverage of vegetation, occupation ratio of bare sandy land and the soil texture were selected as evaluation indexes by using the field investigation data.
中文: 利用外业调查数据，依据地表形态和生态状况的变化，确定了植被盖度、裸沙地占地百分比和土壤质地3项评价指标，并建立了基于遥感的科尔沁沙质荒漠化评价指标体系，其中裸沙地占地百分比用混合像元分解的方法获得。
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英文: During Holocene, Horqin sandy land had several periods of sandy land reduces affected by global climatic undulation, in which the first reduce period during warm time of Holocene profoundly influenced the Hongshan Culture in Xiliao River upstream.
中文: 摘要科尔沁沙地在全新世期间，受到全球气候波动的影响，有过多次沙漠化逆转期，其中发生在全新世大暖期的第一次大规模逆转对西辽河上游地区红山文化产生了深远的影响。
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英文: The evaluation index system of Keerqin sandy desertification was established by using Remote Sensing data, and the occupation ratio of bare sandy land was obtained by mixed spectrum model.
中文: 利用外业调查的数据对该指标体系进行验证，结果表明该指标体系适于研究区域的荒漠化评价。
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英文: The investigation also shows that the shrub is the leading type among the different kinds of bushes and that the sandy land has abundant plant species with high appreciative value.
中文: 毛乌素沙区的植被资源比较丰富，灌木是毛乌素沙区各种灌丛植被的主要生活型，并且具有观赏价值的种类比较丰富。
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英文: Study on Soil Microorganism Groups of Different Types of Sandy Land in korqin Inner Mongolia
中文: 科尔沁不同类型沙地土壤微生物类群的研究
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