Each rule definition contains an optional description, a list of variables, and an expression.
每个规则定义含有一个可选描述、变量列表和一个表达式。
This list is defined as a list of topic expression attached to the filter.
此列表是作为附加到该筛选器的主题表达式列表定义的。
In Listing 2, a few countries are detected through a simple list of names that comprise the regular expression.
在清单2中，通过包含正则表达式的简单的名称列表可以检测一些国家。
The code then iterates through the list and applies a regular expression of the search query to each movie title.
接下来的代码遍历列表，把搜索查询的正则表达式应用于每个电影的标题。
Start by generating the query using the first aggregation function (SUM in the example) in the measure's list of aggregations to aggregate the template expression.
先使用度量的聚合列表中的第一个聚合函数(在这个示例中是SUM)对表达式模板进行聚合，产生一个查询。
This clause is used to assign a value (possibly containing a list of several items) to a variable that can be used in other clauses of the FLWOR expression.
该子句用于将一个值(可能包含一个由多项组成的列表)赋给一个变量，这个变量可以在FL WOR表达式的其他子句中使用。
A list expression is any expression that returns a list of resources or a result that can be converted to a list of resources.
列表表达式是返回一列资源或可以被转换成一列资源的结果的任何表达式。
For each of the measures that are to be in the query, add the SQL expression generated for the measure as a column in the SELECT list.
对于查询中的每个度量，将度量的SQL表达式添加到SELECT列表中作为列。
They wouldn't be allowed to type in a list of files or use some kind of regular expression.
用户不能自己输入文件或使用正则表达式。
Table is fragmented by expression, LIST, or INTERVAL strategy.
表按照表达式、LIST或INTERVAL策略分段。
If the projection column list contains an expression, it must have a valid column alias.
如果projection列列表包含一个表达式，它必须拥有一个有效的列别名。
Access to the list of XML namespaces in scope for the expression, needed when testing the equivalence of names.
访问表达式作用域中xml名称空间列表，在测试名称的等价性时需要。
Once you have an XML object, you can get to the list of photo elements, with the expression rsp.photos.photo.
因为它不是E4X所预期的。有了XML对象，就能通过表达式rsp . photos .photo得到照片元素的列表。
The find function then searches the episode list to find matches using a simple regular expression match on the title and the summary.
然后，find函数搜索剧集列表以便使用与标题和摘要匹配的简单正则表达式来查找匹配项。
The second filter removes any list items where the left side of the expression is a primitive type or a null.
第二个过滤器负责移除任何表达式左侧为一个基本类型或null型的列表条目。
Click add to add the XPath expression to the list of expressions used by this map.
单击add将XPath表达式添加到此映射使用的表达式列表。
The XPath expression selects the list of elements and then returns the first one.
XPath表达式选择元素列表，然后返回第一个元素。
In effect, you are converting the Scheme syntax to a list you can manipulate, manipulating that list, and then converting it back into a Scheme syntax expression for output.
实际的处理过程就是将Scheme语法转换为可以操作的列表，对列表进行操作，然后将它转换回输出的Scheme语法表达式。
To call a function and use its return value as part of a larger expression, simply name it and append a parenthesized argument list.
要调用函数并使用它的返回值作为语言表达式的一部分，只需要命名它并附加一个使用圆括号括起的参数列表。
If you want to obtain a list of last names of the children in this document, you can use the following XPath expression.
如果需要获得文档中青少年的姓氏列表，可使用下面的XPath表达式。
And you can use letter collections (as you might in a regular expression), for example, to list the files with a "c" or "o" extension, as shown in Listing 2.
并且您可以使用字母集合(就像您可能在正则表达式中使用的那样)，例如，用于列出具有“c”或“o”扩展名的文件，如清单2所示。
Finally, the last expression applies the lambda expression to the list containing (101 102).
最终，最后一个表达式对包含 (101 102)的列表应用这个lambda 表达式。
Clojure is a Lisp variant, so evaluation occurs by first reading an expression as a Clojure data structure (usually a list), then evaluating each expression in the data structure.
Clojure是一种Lisp变体，因此计算过程首先将一个表达式读取为Clojure数据结构(通常是一个列表)，随后计算数据结构中的各表达式。
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。
Expression Splitter Router: similar to the List Message Splitter but splits the message based on an expression that returns one or more message parts. For example
表达式分解路由器（ExpressionSplitter Router）：它与列表消息分解器相似，只是它是基于表达式分解消息，将消息分解成一个或者多个部分。
Map and grep evaluate a block or an expression for each element of a list.
Map和grep对列表的每个元素计算块或表达式。
Each expression returns a list of values that can be used as input to other expressions.
每个表达式返回一系列的值，这些值又可以作为其他表达式的输入。
The rule would be properly updated and the server would recompute the new list of variables from the expression.
这个规则被适当更新，服务器从表达式中重新计算新的变量清单。
A FLWOR expression is much like a SELECT-FROM-WHERE expression in SQL: it is used to iterate through a list of items and to optionally return something that is computed from each item.
FLWOR表达式非常像SQL中的SELECT - FROM - WHERE表达式——它用于对由多项组成的一个列表进行迭代，并且可以选择返回通过在每一项上进行计算得到的值。
References to variables within an expression can then be statically bound to a particular slot in either the local stack frame or the list of global variables.
然后表达式中对变量的引用可以静态绑定到本地堆栈框架或一列全局变量的特定槽上。
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