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Desert science
containing
背景
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Chinese
English
周围
背景
浓度
ambient background concentration
地质
背景
geological background
背景
灭绝
background extinction
(由于环境变化所导致的地球物种灭绝)
背景
灭绝率
background extinction rate
背景
种植
background planting
荒漠化
背景
水平
desertification background level
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