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Study of the impact of human activity on ecological environment and the counter-action of environment changes on mankind in Minqin Basin of Gansu──Based on a social investigation in 1999~2000 |
中文意思: 甘肃民勤盆地人类活动对生态环境的影响及其生态环境变化对人类的反作用研究——民勤盆地社会调查结果分析(英文) |
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