名词短语
中文翻译：活树的衰败
同义词：
['decay of life', 'decay of trees', 'decline of trees']
例句：
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1. The forest is in a state of decay, with many trees dying.
森林处于衰败状态，许多树木正在死亡。
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2. The old oak tree is showing signs of decay, and it needs to be replaced soon.
这棵老橡树显示出衰败的迹象，需要尽快更换。
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3.The decline of the local economy has led to a decrease in the number of people working in agriculture.
当地经济的衰退导致从事农业工作的人数减少。