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forest deterioration
ecol. 森林破坏; 森林退化
tech. 森林逐渐衰败
forest- deterioration
agric. 森林破坏
forest deterioration Reduction of tree population in forests caused by acidic precipitation, forest fires, air pollution, deforestation, pests and diseases of trees, wildlife, etc.
environ. 森林退化 (森林树木数量的减少,主要因为酸性降水,森林火灾,空气污染,森林砍伐,虫害和树木疾病,野生动物等。)