如果该行与正则表达式匹配，则打印该行。
If the line matches the regular expression, then you print out that line.
如果参数可为空值，则表达式可能为空值。
The expression may be a null value if the parameter is nullable.
如果输入文本与正则表达式匹配，则该方法返回true。
If the input text matches the regular expression, what this method returns is true.
如果遇到一个整数，则表达式是有效的，解析器将完成工作。
If it encounters one, the expression is valid and the parser is done.
如果不是这样，则引擎将编译正则表达式并将其添加到缓存中。
If not, the engine will compile the regular expression and add it to the cache.
如果源与正则表达式相匹配，则值为True，否则将返回false。
Value is True if the source matches against the regular expression, otherwise false is returned.
您可以将数据与正则表达式进行比较，如果它们匹配，则知道数据是有效的。
You can compare data to a regular expression; if they match, you know your data is valid.
如果在任何时候不再需要编译后的正则表达式，则使用regfree删除它。
If at any time you no longer need the compiled regular expression, dispose of it with regfree .
如果返回表达式，则表达式应与return关键字在同一行，以避免误加分号错误。
The return value expression must start on the same line as the return keyword in order to avoid semicolon insertion.
如果您遇到一个需要使用正则表达式函数的实例，则您将很可能要创建用户定义的函数来处理您的要求。
If you come across an instance where you need to use regular expression functions, then you will likely have to create user-defined functions to handle your requirement.
regexmatch函数为SQLServer提供了许多功能，而. NET中的正则表达式实现提供的功能则更多，正如您在下面内容中将看到的一样。
The RegexMatch function provides many features to SQL Server, but the regular expressions implementation in.net provides much more, as you'll see next.
一旦认为某个表达式是有效的，则它的第二项工作是将输入流分解成其组件块，并以某个有用的方式将它们提供给您。
Its second job, once an expression has been deemed valid, is to break the input stream into its component pieces and deliver those to you in some useful fashion.
如果您已经花费了大量的时间使用面向对象的语言，则您可能已经遇到了表达式问题的例子。
If you've spent a significant amount of time working with object-oriented languages, you've probably run into examples of the Expression Problem.
如果表达式包含括号，但不包含操作符，则存在一个函数。
If the expression contains parentheses but no operators, there is a function here.
尽管清单34中的表达式能够工作，但是使用慎重应用的括号则更为清晰，并且容易改编来选择第二个、第三个或者任何其他索引。
Although the expression in Listing 34 works, using carefully applied parentheses does the job more cleanly and is easily adapted to select the second, third, or any other index.
如果表达式包含括号，但不包含操作符，则存在需要求值的函数。
If the expression contains parentheses but no operators, there is a function here that needs to be evaluated.
如果表达式产生多个节点，则仅使用第一个节点。
If the expression results in more than one node, then only the first node is used.
如果测试表达式的计算结果为true并且没有导致动态的或类型错误，那么则认为元素在逻辑上是有效的。
If the evaluation of the test expression is true and does not result in a dynamic or type error, the element is considered locally valid.
如果XPath表达式本身包含%，则必须按xml的指定方式将其转义(使用%)。
If the XPath expression contains a % sign itself, it must be escaped as specified by XML (using %).
如果XPath表达式本身包含一个百分号，则必须按xml的指定方式将其转义(使用%)。
If an XPath expression contains a percent sign itself, it must be escaped, as specified by XML (using %).
如果选择了重复元素(repeating element)选项，则必须提供XPath表达式。
If the repeating element option is selected, then an XPath expression must be provided.
如果XPath表达式返回了多个节点并且指定了XPathConstants . NODE，则evaluate按照文档顺序返回第一个节点。
If the XPath expression does return more than one node and you've specified XPathConstants.NODE, then evaluate returns the first node in document order.
如果表达式读到true，则数据将成功通过过滤器。
If the expression reads true, the data will come through the filter.
如果这个表达式的值为true，则表示该里程碑项目完成。
If the expression evaluates to true, then milestone item is considered complete.
这些类型替换将依次执行计算，直到其中一个XPath表达式的值为true(如果值均不为true，则选择默认的类型定义)。
The type alternatives are evaluated in order until one of the XPath expressions evaluates to true (or, if none evaluate to true, the default type definition is chosen).
如果解析器在其扫描期间发现了除这三个记号外的任何其它记号，则认为它正在扫描的表达式是无效的。
If the parser finds anything other than these three tokens during its scan, the expression it's scanning is considered invalid.
如果查询表达式中没有任何步骤，则查询表达式将产生开始节点，挂起任何附加的筛选。
If there are no steps in the query expression, the query expression results in the start node, pending any additional filtering.
如果容器名称中在数据库分区表达式后面没有空格字符，则认为剩下的字符串是表达式的一部分。
If there is no space character in the container name after the database partition expression, it is assumed that the rest of the string is part of the expression.
如果您不定义表达式，则它将标记为错误。
If you do not define the expressions, it will be marked with an error.
第一个表表达式产生57行，而第二个表表达式则产生5+7+9=21 行。
The first table expression produces 57 rows, and the second table expression produces 5+7+9=21 rows.
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