Not all access modifiers can be used by all types or members in all contexts, and in some cases the accessibility of a type member is constrained by the accessibility of its containing type.
并非所有存取修饰词在任何情况下都可供所有型别或成员使用,而且在某些情况下,型别成员的存取范围会受到其包含型别的存取范围限制。
A member type can reference one to many sources.
一个成员类型可以引用一个到多个源。
That is a member which is identified only by its type.
这是一个只能被其类型识别的成员。
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