每一个编程人员或早或晚都将会遇到表达式问题，因此每一种编程语言都会有一些答案。
Every programmer will encounter the Expression Problem sooner or later, so every programming language has some sort of answer to it.
这是一种新型表达式语言，拥有优秀的集合、对象图遍历和索引支持功能。
This is the newer form of expression languages and has excellent collection, object graph traversal, and indexing support.
它定义了一种xml语言，可用于定义新类型的词汇表示的正则表达式。
It defines an XML language for defining regular expressions for the lexical representation of new types.
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