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。

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.

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在算逻部件中，寄存器存放要进行加、减、乘、除及比较的数据项，而其它寄存器则存放算术及逻辑操作的结果。

In the ALU, registers strore data items that are added, substracted, multiplied, divided and compared. Other registers strore the result of arithmetic and logic operations.

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算术逻辑部件的缩写，执行全部算术计算，例如加法和乘和全部比较运算的一台计算机的零件。

Abbreviation of arithmetic logic unit, the part of a computer that performs all arithmetic computations, such as addition and multiplication, and all comparison operations.

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