His face took on a set expression.
他脸上现出凝滞的神态。
A watchpoint will break program execution when the specified expression changes value, but it must be set when the variables used in the expression are in scope.
当指定表达式的值改变时，监视点将中断程序执行，但必须在表达式中所使用的变量在作用域中时设置监视点。
When I set out looking for an algorithm, I looked at examples in a specific context (regular expression) and I attempted to match them to a completely different context.
当我开始寻找算法时，我看了在特定上下文(正则表达式)中的一些示例，而且尝试了将它们与一个完全不同的上下文相匹配。
The power behind much of this automation is the regular expression, a veritable set of hieroglyphics to find, match, and decompose strings.
实现这种自动化主要依靠正则表达式，它是用来查找、匹配和分解字符串的一组真正的象形文字。
In addition to a rich set of tags, the JSTL defines its own expression language (EL).
除了一组丰富的标记外，JSTL还定义了自己的表达式语言(EL)。
An example of a standard associated with contract expression is the CRUD (create, read, update, delete) convention traditionally used to outfit components with a predictable set of methods.
服务表达相关的标准的一个例子是CRUD(增删改查)，传统上，它用于给组件配备一组可预见的方法。
Looking at the code, you can see that the regular expression pattern was set to match a line that contained 20-29%.
查看该代码，可以看到正则表达式模式被设置为匹配某个包含20- 29%的行。
You can set the feature values of an annotation by assigning a sub-pattern of the regular expression rule-a match group-to the feature.
通过把正则表达式规则的子模式(匹配组)分配给特性，可以设置注解的特性值。
An XPath expression allows you to define a set of node relationships in the document and return subsets of content from the document based on these relationships.
XPath表达式允许您在文档中定义一个节点关系集，并允许根据这些关系从文档返回内容的子集。
John Lennon's remark that "we're more popular than Jesus, " which set off an anti-Beatle furor last year, was not a boast but an expression of disgust.
JohnLennon的“我们比耶酥更受欢迎”去年曾激起很大的反披头士热潮，这并非自吹自擂，而是一种令人反感的表达。
These transformations group a set of mappings based on a given XPath expression condition.
这些转换根据给定的XPath表达式条件对映射进行分组。
This is because the XQuery expression in the XMLQUERY function is applied to one row (document) at a time and never removes a row from the result set, only modifies its value.
这是因为XMLQUERY函数中的XQuery表达式每次应用于一行(文档)，并不会从结果集中去掉一行，只是修改它的值。
The following case study illustrates the migration of a report that USES the nestedSet function in an expression outside the within set clause of analytic summary function.
下面的案例研究展示如何迁移这样一个报告：报告在分析摘要函数的withinset子句外部的一个表达式中使用nestedset函数。
The result from this second expression is a node set, which maps to the dom org.w3c.dom.NodeList type.
第二个表达式的结果是一个节点集，映射到dom or g . w3c. dom . NodeList类型。
Breakpoints can be set to unconditional using the 'condition' command specifying a breakpoint number without an expression, for example 'condition 1' sets breakpoint 1 to unconditional.
使用'condition '命令时，如果指定断点编号但又不指定表达式，可以将断点设置成无条件断点，例如，' condition1 '就将1号断点设置成无条件断点。
The next element is named and represents an XQuery expression for retrieving a set of XML documents from the database that match particular criteria.
下一个元素是，其中指定用于从数据库获取一组与搜索条件匹配的XML文档的XQuery表达式。
The equ directive is used to set the value of the variable STR_SIZE to the expression following it. A similar idiom in GAS looks like this.
equ用来将变量str_size的值设置为后面的表达式。
Sed has a limited set of commands, but these combined with regular expression syntax and the hold buffer make for some amazing capabilities.
Sed提供了一组有限的命令，但是这些命令结合了正则表达式语法和保持缓存，因而实现了某些非常令人吃惊的功能。
The XQuery expression to retrieve a set of XML documents is followed by another XQuery expression that is used to retrieve one specific XML document from the database.
获取一组XML文档的XQuery表达式后面是另一个XQuery表达式，它用于从数据库获取指定的一个XML文档。
For convenience, WS-Policy defines both a normal-form expression of a policy and a set of rules you can use to create more-compact policy expressions.
为了方便起见，WS - Policy定义了一个标准形式的策略表达式和一组可以创建更紧凑的策略表达式的规则。
Coined by Philip Wadler, the expression problem defines a program's data as a set of cases (types) and a set of operations over those cases.
表达式问题这个词是由Philip Wadler定义的，它将一个程序的数据定义为一组用例(类型)和对于这些用例的一组操作。
For example in the filter expression $x[count(.|$y)=count($y)] (which is the only convenient way in XSLT 1.0 of doing a set intersection operation), Saxon will evaluate count($y) only once.
例如，在过滤器表达式 $x[count(.|$y)=count($y)]中（它是XSLT 1.0 中执行一组逻辑乘操作的唯一简便方法）中，Saxon 只对 count($y) 求值一次。
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。
We could write an expression here that matched a set of methods, on many classes.
我们可以在这编写一个表达式来匹配许多类的方法的集合。
Each expression conveys a set of related messages.
每个表情都传达着一系列相关信息。
This means that a variable may reject attempts to set its value to something malicious or simply nonsensical by referring to a regular expression (or even a piece of code).
这意味着通过引用正则表达式(或者甚至是一段代码)，变量会拒绝将其值设置为某些恶意的值或完全无意义值的尝试。
Sometimes -- such as when you're evaluating an expression that returns a set of nodes, or even a single node -- this can create a big mess.
有时候，比如计算的表达式返回一个节点集或者一个节点，这可能造成很大的混乱。
For example, when the actual value or the expression is a node-set, the final Boolean result is known as soon as a single member of the node-set is found.
例如，当实际值或表达式是一个节点集时，一旦找到节点集的一个成员时，就可以立即知道最终的布尔值结果。
You can also set up the Boolean expression to call a method.
也可以建立布尔表达式以调用方法。
For example, some problems lend themselves to more succinct expression as a state machine than as a set of declarative rules.
比如，有些问题使用状态机比使用声明性规则具有更加简洁的表述。
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