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。
Through the evaluation of the road junction, to find the intersection in the operation of the main problems, and ensure traffic safety and enhance the capacity of the intersection.
通过评价道路交叉口，找出该交叉口运行中存在的主要问题，保证行车安全和提高交叉口的通行能力。
The theories of Boolean operations union, intersection and subtraction operation in the com puter arts design are discussed.
讨论布尔运算的并集、交集、差集运算原理在电脑美术设计中的应用。
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