The concept of expression reduction is widely used in functional languages, and is particularly appropriate for optimizing a language such as XPath.
在函数型语言中已经广泛使用的表达式减少的概念，而且此概念特别适用于优化语言，如 XPath。
A method of evaluating utterance nodes based on Language Weighted Aggregation (LWA) operator and node reduction was proposed.
给出了基于语言加权集结(LWA)算子和节点归约的发言节点评价方法。
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