For example, if the CustomerReferral class were derived from the Customer class discussed previously, it might inherit properties that make no sense, such as ShippingPrefs and LastOrderPlaced.

 
  • 例如,如果CustomerReferral类是从前面讨论过的Customer类派生的,则它可能继承毫无意义的属性,如ShippingPrefs和LastOrderPlaced。
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