For example in the filter expression $x[count(.|$y)=count($y)] (which is the only convenient way in XSLT 1.0 of doing a set intersection operation), Saxon will evaluate count($y) only once.
例如，在过滤器表达式 $x[count(.|$y)=count($y)] 中（它是 XSLT 1.0 中执行一组逻辑乘操作的唯一简便方法）中，Saxon 只对 count($y) 求值一次。
XML data communication is discussed. Expression of display contents or parameters by XML make display picture data convenient to amend or edit, and easy to transmit and store.
使用XML表达交通诱导显示图片的显示内容以及播放参数，使得显示图片内容可再编辑和修改，同时为数据的传输、存储带来了方便。
The electronic teaching notes have the features of rich content, various expression, powerful function, easy use and convenient modification and expansion.
该电子教案内容丰富，表现形式多样，功能强大，使用容易，修改、扩展方便。
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