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。
If connect a basic English expression to all have difficulty, very difficult convenient and opposite and regular in the business environment with English of norm carry on exchanges.
如果连基本的英语表达都有困难，就很难在商业环境中用相对正规和规范的英语进行交流。
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。
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