如果正在传递给解析器代码的表达式不能根据语法合法地构造，则将抛出ParseException或LexicalError。
If the expression you're passing in to the parser code can't be legally constructed according to the grammar, either a ParseException or a LexicalError is thrown.
如果正在传递给解析器代码的表达式不能根据语法合法地构造，则将抛出ParseException或LexicalError。
If the expression you're passing in to the parser code can't be legally constructed according to the grammar, either a ParseException or a LexicalError is thrown.
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