接着引入输入波阻抗的概念，把理论推广到多层媒质的情况。
The concept of input wave impedance is introduced in order to generalize the developed theory to multi-layer medium cases.
可以引入输入JS p页来通过请求中的存储属性传递消息映射，从而完成此工作。
You can achieve this by introducing an input JSP page to pass the message map via a stored attribute in the request.
随着 XML 模式和文档类型的引入（旨在控制条目的添加和输入以及检查缺失的元素），本文中描述的设置会变得更复杂。
The setup described in this article can become more complicated with the introduction of XML schemas and doctypes to control the addition and entry of items and to check for missing elements.
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