它们是简单但功能强大的泛化正则表达式，比起传统的LALR或者LR-1语法的解析器生成器来说更易于使用。
They are a simple but powerful generalization of regular expressions that are easier to work with than the LALR or LR-1 grammars of traditional parser generators.
如果您发现或发明了该语言的某种经过微小更新的变体，将它和ebnf语法一起使用要比和那些正则表达式一起使用简单得多。
If you discover or invent some slightly new variant of the language, it is a lot easier to play with the EBNF grammar than with those regular expressions.
SQLVALUES表达式的语法相当简单，如 清单6 所示。
The syntax for the SQL VALUES expression is fairly simple, as shown in Listing 6.
解析表达式语法（PEGs）编写简单、易于维护。
Parsing expression grammars (PEGs) are simple to write and easy to maintain.
为了让编程对人而言更加简单，这些表达式采用与传统数学公式尽可能类似的语法。
To make programming easier for humans, these expressions tend to have a syntactic form that mirrors as closely as possible the representation used in traditional mathematical formulae.
XQuery采用一种简单的语法，混合了XML、XPath、注释、函数以及将其结合在一起的专用表达式语法。
XQuery USES a simple syntax that is a mix of XML, XPath, comments, functions, and a special expression syntax to tie it all together.
OGNL支持基本的表达式语法保证你能写出简单的基本功能。
OGNL supports basic lamba expression syntax enabling you to write simple functions.
OGNL支持基本的表达式语法保证你能写出简单的基本功能。
OGNL supports basic lamba expression syntax enabling you to write simple functions.
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