In addition, an interface can contain constant declarations.

另外，接口可以包含常量声明。

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They must be marked public and must match the declarations in the class interface.

它们必须标记为公用并且符合类别介面内的宣告。

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They must be marked public and must match the declarations in the class interface.

它们必须标记为公用并且符合类别介面内的宣告。

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