一个处理器的标准地址空间。
电子邮件地址有多种格式，但是有一种标准格式。
E-mail addresses can have several forms, even though there is a standard format.
email - address . xsd：EmailAddress类型约束数据为标准的电子邮件地址。
Email-address.xsd: The EmailAddress type constrains data to a standard E-mail address.
一个标准的MAC地址是6字节，16进制表示，就像这样。
A MAC address is formatted as a six-byte, hexadecimal number, like this.
一个标准的MAC地址是6字节，16进制表示，就像这样。
A MAC address is formatted as a six-byte, hexadecimal number, like this.
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