在极大值函数的有效域为非空凸集的条件下研究了次微分，并给出它的结构表达式。
And the expression of its subdifferential is developed in the case that the effective domain of the sup-type function is a non-empty convex set.
研究提出并证实了聚合过程中的一些主要反应，并由此推断了共聚产物的结构表达式。
The main reactions in the polymerizing process was proposed and the structure of copolymer was suggested.
所以，如果你需要用数学式子计算一个值，那就只有用表达式返回这个值，没有其他语法结构可用，因为否则就无法处理这个值。
And so while you needed expressions for math to work, there was no point in making anything else return a value, because there could not be anything waiting for it.
这意味着您可以编写导航模型内存结构的表达式。
This means that you can write expressions that navigate the in-memory structure of the model.
对输入文档的结构进行任何修改，都需要对表达式进行大量调整。
Any changes to the structure of the input document create more places in which you have to adjust the expression.
一般来说，选用熟悉的定位器表达式，并在脚本结构中保持一致。
In general, choose familiar locator expressions and be consistent in script structure.
不要用正则表达式读取直接来自用户的XML，因为无法控制这类XML的格式或结构。
Don't use regular expressions to read XML that comes directly from users; you don't control the form or structure of that XML.
它包含了一种脚本引擎，这让我们可以把声明和对表达式的求值作为程序中的顶级结构。
It contains a scripting engine that allows evaluation of expressions and statements as top-level constructs in programs.
这段代码是程序基本结构的一个例子，我们称之为表示计算结果的表达式。
This piece of the code is an example of an essential programming construct called an expression that represents the result of computation.
表达式由数据结构、绑定的变量（即具有值的变量）、数学操作符和函数调用组成。
The expression is composed of data structures, bound variables (that is, those with a value), mathematical operations and function calls.
只要熟悉文档的结构，很容易编写这种表达式。
As long as you have a good idea of your document's structure, such expressions are easy to write.
在大多数情况下，可以将可用节点集分为三类：表达式、代码片段和控制结构。
For the most part, you can divide the available set of nodes into three types: expressions, snippets, and control structures.
从XML数据结构到搜索引擎的映射是使用XPath表达式来完成。
The mapping maps from the XML data structure using xpath expressions into the search engine.
该表单只使用csymbols，基本上只要更改元素名称就可以与OpenMath匹配，表达式结构保持不变。
This form only USES csymbols and can be trivially mapped to OpenMath essentially just by changing element names, but preserving the expression structure.
正则表达式提供了跨文本的字符串的更丰富的模式匹配，但在遍历诸如xml树这样的数据结构时，它和XPath一样易于使用。
Regular expressions provide much richer pattern matching across strings of text, but are as easy to use as XPath when traversing a data structure such as an XML tree.
Scala另外一个拥有丰富特性的类似控制结构是for循环，在Scala社区中也被称为for推导语句或者for表达式。
Another familiar control structure that's particularly feature-rich in Scala is the for loop, referred to in the Scala community as a for comprehension or for expression.
但是XQuery表达式可以利用XML的结构。
However, XQuery expressions can exploit the structure of the XML.
Perl5正则表达式所缺少的不止是可读性——它们还缺少结构和复用性。
Perl 5 regular expressions lack more than readability — they lack structure and reusability.
反之，Django使用了一个单独的基于正则表达式的配置文件将URL映射为底层代码，这样就降低了URL路径结构与实际实现之间的耦合程度。
Conversely, Django USES a separate regular expression-based configuration file to map URLs to the underlying code, decoupling the URL path structure from the actual implementation.
因为Scala中的if结构自身就是一个表达式，所以重写上述代码会使它们成为清单3中所示的更正确的代码片段。
Because the if construct in Scala is itself an expression, you can rewrite the above code to the arguably more correct snippet shown in Listing 3.
然后，我们探索了Scala增强的循环结构和条件表达式。
Then we explored Scala's enhancements to looping constructs and conditional expressions.
这些属性通常与高层次编程结构有关，我们将看到Perl6正则表达式如何解决这三个问题。
These are attributes commonly associated with higher-level programming constructs, and we'll see how Perl 6's regular expressions address these three problems.
在Ruby中，如果条件结构的体只有一行，那么可以编写清单11中所示的表达式。
In Ruby, if the body of a conditional is a single line, you can write expressions like the one shown in Listing 11. Also note that the same conditional could also be written as definition.word.
清单3中的示例显示了使用公共表表达式创建结构化的XML。
The example in Listing 3 shows the creation of structured XML using common table expressions.
然后，数据被使用诸如XML模式表达式索引、B-树结构索引、结构索引、内容或关键字索引之类技术以及其他技术进行索引。
The data is then indexed using techniques such as XML pattern expression indexing, B-tree structural indexing, structural indexing, content or keyword indexing, and others.
当在表达式中使用. .时，它能指示表达式从层次结构中的当前节点上提一层(这亦类似于unix操作系统内目录的处理)。
When you use.. in an expression, it instructs the expression to work up one level from the current node in the hierarchy (again, similar to working with directories in UNIX operating systems).
正则表达式用来从有着非正式结构的字符串中提取数据是很方便的，但是对“结构性数据”(就是类似XML，或者JSON那样的格式)则不是。
Regular expressions are convenient for extracting data from strings that have an informal structure, but are not "structured data" (that is, in a format like XML or JSON, for example).
清单8中所示的caseex：语法是另一个Scala结构(匹配表达式)的一部分，该表达式用于Scala中的模式匹配。
The case ex: syntax you see in Listing 8 is part of another Scala construct, the match expression, which is used for pattern matching in Scala.
要对表达式求值，该结构中的每个类都有一个evaluate()方法，它负责返回表达式的值。
To evaluate the expression, each class in this structure has an evaluate() method, which is responsible for returning its value.
要对表达式求值，该结构中的每个类都有一个evaluate()方法，它负责返回表达式的值。
To evaluate the expression, each class in this structure has an evaluate() method, which is responsible for returning its value.
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