- 长期性缺陷
- defect: vi. 叛变；逃走。 He defected to th ...
- chronic: adj. 1.慢性的；长期的；积习成癖的。 2.〔英俚〕 ...
- defect: n. 1.缺陷，缺点，弱点；短处。 2.不足，缺乏。 have some defect in eyesight 目力不佳。 have the defects of one's qualities 美中不足之处。 in defect of 若无…时；因无。 vi. 叛变；逃走。 He defected to the West. 他叛逃到西方。
- in defect of: 缺少; 若无...时
- no defect: 无缺陷的
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