degenerating
v.
衰退，堕落，退化( degenerate的现在分词 );
例句:
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He denied that some young people today were degenerating.
他否认现在某些青年在堕落。
来自《权威词典》
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A degenerating cyst is usually collapsed and surrounded by inflammatory exudate and fibrous connective tissue.
退化的包囊通常萎陷,并被炎性渗出物和纤维结缔组织所包围.
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Young people of today are not degenerating.
今天的青年并没有在变坏.
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They have even helped restore sight to mice blinded by degenerating retinas.
来自SA
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Like most music movements, grunge eventually ate itself, degenerating into just another fad.
来自BBC