I can think of no fields better than here.
我想不到比这里更好的场地了。
There are no fields configured for this content type.
没有为这个内容类型设置字段。
If a class contains only primitive fields or references to immutable objects, then it is usually the case that no fields in the object returned by super. clone need to be modified.
如果一个类只包含基本字段或对不变对象的引用,那么通常不需要修改super . clone返回的对象中的字段。
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