- 陷可见度
- visibility: n. 1.能见性[度];可见物;可见度;可见性。 2.可见距离;视界。 3.显著,明显(度),明白。
- 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
- angle of visibility: 观察扇面; 可视角
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