Since you can set any arbitrary attribute value (and yes, that includes values that you define) to a constraint expression or use it in a constraint, there are a lot of possibilities.
由于可以为约束表达式设置任何任意的属性值(包括您自己定义的值)，或者在约束中使用它，因此存在很多可能。
That alone is almost worth the price of admission if you're new to regular expressions or if you use advanced regular expression features.
不管您是常规表达式的新手还是已经开始涉足高级常规表达式特性，这点购买的投入都是很值得的。
You can use a simple regular expression to specify that you want to find a line containing one word followed by another.
可以使用简单的正则表达式指定寻找包含某一单词而且后面有另一个单词的行。
You can use a scalar subquery to select a specific value that will be used in the expression of the WHERE clause.
可以使用标量子查询选择将用于where子句的表达式中的特定值。
Use the .Compile() method to turn the expression tree into a delegate so that you can execute it.
用.Compile()方法去将一个表达式树转换为一个委托，然后你可以执行它。
In itself, this isn't very useful, but what's important is that you can use DOM manipulation code on the Node returned from the XPath expression evaluation.
返回的结果本身没有多少用处，但关键是可以使用DOM对XPath表达式求值返回的Node进行操作。
Following is a list of the StorageArea properties that you cannot use in a storage policy filter expression.
下面是存储区域筛选器表达式中不能使用的StorageArea属性。
To make this code a bit more robust, use a regular expression rather than assuming that the start-tag is exactly as shown above. In particular, you can account for a variety of possible attributes
为了使代码更加健壮，可以使用正则表达式而不是假定起始标签和前面相同。
To get the first names of the students that have the last name Silver, you can use an XPath expression like the one in Listing 2.
要查询姓 Silver的学生的名，应该使用类似于清单2中的 XPath表达式。
You can use any expression that you want as a value.
您可以使用任何需要的表达式作为一个值。
If all you need to do with an XML file is grab some text from within a single node, it might be possible to use a simple regular expression that will probably operate faster than any XML parser.
如果对XML文件所做的全部操作只是从单个节点获取一些文本，可以使用一个简单的正则表达式，其处理速度可能会比任何xml解析器都快。
What is the use of studying Greek unless you can bring all beauty of that language and literature into your thinking and your expression today?
如果不是为了能够将希腊语言和文学的优美融合进你的思维和表达中，你学习它还有什么其他的用处？
Notice that you can use the context directly in a sub-expression, without necessarily making it part of another expression. The result is.
请注意，您可以在子表达式中直接使用上下文，而无须使之成为另一个表达式的一部分。
Once you have the root node of the XML document, you can use a GPath expression (for example, list.user.login.text()) to assert that the element contains the expected value (in this case, suziq).
一旦拥有了XML文档的根节点，您就可以使用GPath表达式（例如 list.user.login.text()）来断言，元素包含预期的值（在本例中为 suziq）。
For instance, you could use the code in Listing 14 to achieve an effect similar to that shown in Listing 13; this time, all CDs are iterated over, and a Boolean XPath expression is applied.
比如，可使用清单14中的代码来实现和清单13类似的效果，这一次在迭代全部CD的过程中使用了xpath布尔表达式。
You can use this tool to familiarize yourself with the Perl-compatible regular expression (PCRE) library and to debug or test regexps that you build with it.
可以使用此工具来熟悉兼容perl的正则表达式(Perl - compatibleregular expression,pcre)库和调试或测试使用其构建的regexp。
A use-when test can also help you choose collations, as long as it includes an expression that will tell you which collations are available.
use - when测试还可以帮助选择定序法，只要包含的表达式告诉您可用何种排序法。
A lambda function is a function definition that you use to pass higher-order functions into Lisp functions. For example, the lambda expression in Listing 10 computes the sum of two integers.
lambda函数是用于将高阶函数传入lisp函数的函数定义。
It is something you too will eventually master and use for its clarity of expression, unlike words that can sometimes be inadequate.
这也是你们将最终掌握和使用的表达方式，而不像话语那样有时候会词不达意。
If you just start a new type of activity - driving or flying a plane, or anything that requires a lot of learning - you may use this expression as you start to get better at it.
如果你刚刚开始一项新的活动-开车或者开飞机，或者其他需要学习的事情-如果你开始比较不错了，就可以用到这个短语。
This is an expression we use in English to say that you had such a dramatic fall that your head was over your feet and we use it when we want to say that someone fell madly in love.
这个表达在英语里表示狠狠地摔了一跤，跌了个四脚朝天，也可以用来表示某人疯狂地陷入了爱河！
This means that today, you can use this expression even if you never wear a belt at all.
这个意味着现在即使你没有用皮带你也能这样说。
You can use a memory location specifier with any value or expression that evaluates to a location.
可以使用带有计算为位置的任何值或表达式的内存位置说明符。
Because the Regular Expression generator is not guaranteed to produce unique values, you cannot use it to fill a user-defined type column that has a unique constraint.
由于无法保证规则运算式产生器一定会产生唯一的值，所以您不能使用它来填满具有唯一条件约束的使用者定义型别资料行。
Try to use a facial expression that denotes an aura of being highly engaged, as if your work has consumed you-looking unavailable here will help.
尝试表示高度专注的面部表情，就好像你被工作消耗了一般—这个时候，看起来没空会对你有所帮助。
Wherever you use a column in a query, you can also use an expression that can consist of any combination of columns, literals, operators, and functions.
在查询中使用列的任何位置，都还可使用由列、文本、运算符和函数的任意组合组成的表达式。
For example, you can enter text into a text box control and use the expression to search for that text in columns that are returned from a data source control.
例如，可以向文本框控件中输入文本，并使用此表达式搜索从数据源控件返回的列中的该文本。
For example, you can enter text into a text box control and use the expression to search for that text in columns that are returned from a data source control.
例如，可以向文本框控件中输入文本，并使用此表达式搜索从数据源控件返回的列中的该文本。
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