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来源:雅诚德英语网
For many years I have studied global agricultural, population, environmental and economic trends and their interactions.
多年来,我在研究全球农业、人口、环境和经济趋势及其相互作用。
For many years I have studied global agricultural, population, environmental and economic trends and their interactions.
多年来,我在研究全球农业、人口、环境和经济趋势及其相互作用。