Soil degradation is one of the most serious environment problems in the world, which threatens the human existence directly.
土壤退化是全球性的重大环境问题之一，直接威胁人类的生存。
Soil degradation is one of the most serious environment problems in the world, which threatens the human existence directly.
土壤退化是全球性的重大环境问题之一，直接威胁人类的生存。
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