Note that only a policy which includes the Optional attribute or the <wsp:ExactlyOne> operator has more than one alternative.

注意，只有包含 可选属性或 <wsp:ExactlyOne> 操作符的策略才有多个替代。

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They are marked by the m// operator (sometimes optional) when matching, and by the s/// operator when matching and replacing.

在进行匹配时，要用 m// 操作符来标识这些正则表达式（有时是可选的），而当匹配并替换时，则要用 s/// 操作符来 标识它们。

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Controls are simple and easy to use. Output parameters can be easily identified and adjusted. Operator interface has optional hands free aligning and pulse triggering.

控制简单，使用方便。所输出的参数容易辨认和调整。操作界面可以选择非手工排队和脉冲。

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