If there was a defect in the Person class, there would most likely be a defect in the Employee class as well because it appears as though the implementation was copied between the two.

如果person类中有缺陷，则employee类中也很可能有一个缺陷，因为看上去似乎实现是在两个类之间复制的。

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Aiming at the characteristic in feature extraction of cold steel strip surface defect images, a mixed feature extraction method of separable criterion based on class distance is proposed.

针对冷轧带钢表面缺陷图像特征提取的特点，提出了基于类距离可分离性判据的混合特征提取方法。

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