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跟着Serena觅好食
水土流失: water loss and soil erosionRelative explainations:
淡水氤氲
Casually trees litteringLand desertificationThe river dirty
新雨初晴水星
Casually trees 乱伐树木drop litter carelessly 乱扔垃圾Land desertification 土地沙化river water become dirty 河水变脏
静静的娇儿
水土流失water loss and soil erosion沙漠化earth's desertification
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