现在比较一下，哪一个能够不费力的将域添加到一个无状态的电子邮件规则记录中。

Now, compare all this to the ease with which a field can be added to a stateless E-mail rule record.

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Guru转过身去，边走边说道：“呃，关键问题是，如果一个类里面有多个域，编写这个类的比较函数时要保持警惕。”

The Guru turned and continued as she walked away, "The, er, key, my apprentice, is to keep your wits about you when writing comparison functions that deal with multiple fields."

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对于数据类型，例如整数或字符，要生成输入域就比较简单，但是对于xml类型的输入参数，就要更复杂一些。

The latter is simple for data types, such as integer or characters, but more complex for input parameters of type XML.

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