直到现在，表达消息条件事实上还没有一个一致的方法，以便们可以应用于中间件层。
Until recently, there really has never been a single consistent way of expressing message conditions so that they can be applied on the middleware layer.
为了能够表达消息的语义，以及它们对系统状态的影响，我们引入了前置条件和后置条件。
To be able to express semantics of messages and their effects on system state we introduced pre- and postconditions.
本文描述的示例应用程序提供一个简单的 C++原型，以演示管理服务如何表达一系列XML请求-响应消息。
The sample application described in this article provides a simple C++ prototype to demonstrate how administration services can express a series of XML request-response messages.
注意对话的语气。记录下人们怎样靠语调的变化来影响和表达惊喜，沮丧或者分享消息。
Pay attention to the tone of the conversation. Note how people use inflection to influence, to express surprise or frustration or to simply share information.
这些表达式用于指示输出消息组件中的目标元素，其中获取的元素应该重写现有值(假如树中已经存在元素)。
These are used to indicate a target element in the out going message assembly, where an acquired value should overwrite the existing value (in the case where the element already exists in the tree).
通过使用基于内容的路由，可以很方便地针对消息的内容评估SQL表达式，从而决定订阅者是否真的需要获得消息。
By using content based routing, it is easy to evaluate an SQL expression against the contents of a message and take a decision whether the subscriber really need to get the message or not.
在他们赶回家告诉父母这个好消息的路上，特地去向老和尚表达他们的谢意和对他智慧的钦佩。
On their way home to tell their parents the wonderful news about the examination, they made a special trip to give their thanks to the old monk, and compliment him on his wisdom.
同样的，在Mule中我们也提供了扩展表达语言，这使得查询、操作消息以及使用任何JSR-223规范支持的语言都非常容易。
We also, have an extensive expression language in Mule that makes it easy to query and manipulate messages and drop into any JSR-223 supported language.
我意识到相当好的length_message可以从其它属性上生成，但我感觉如果它由程序员编写，那么消息的复数化以及用短语表达就会更好。
I realize that a pretty good length_message could be generated from the other attributes, but I felt that the pluralization and phrasing of messages would be better if it was written by a programmer.
通常，该节点允许根据内容路由输入消息，其中使用XPath作为表达式语言来查询内容(消息处理路由语言)。
Typically this node allows the incoming message to be routed based on its content, where XPath is used as the expression language to query the content (message processing routing language).
您可以添加消息树的新数据类型或元素，以便在表达式中使用。
You have the ability to add new data types or elements of the message tree for use in the expression.
她去世的消息传出后不久，明星，音乐批评家和爱好者在社交网站上表达了哀悼。
Shortly after the news of her death spread, celebrities, music critics and enthusiasts expressed dismay on social media sites.
如果数据与当前的正则表达式匹配，则应用程序显示一条消息，表明邮政编码有效。
If the data matches the current regular expression, the application displays a message to indicate that the postal code is valid.
文本消息必须符合的模式是通过初始化文件中的元素中定义的正则表达式定义的。
The pattern that the text message must correspond to is defined through a regular expression defined through the element in the initialization file.
我们可以使用这些表达式快速转换当前的消息、构造新的消息以及进行基于内容的路由。
These expressions can be used to quickly transform the current message, construct new messages and do content based routing.
和主题选择一样，消息选择标准表达式使用sql样式的语法定义，该语法必须求解出一个布尔值。
Like topic selection, message selection criteria expressions are defined using a SQL-like syntax, which must resolve to a Boolean value.
正如前面提到的，插件扩展了即时消息传递客户机，它会根据初始化文件中的正则表达式，分析消息并寻找特定的关键词。
Remember that the instant messaging client was extended to analyze and scan the messages for particular key phrases, as specified through a regular expression in the initialization file.
我认为通道语义(当发送的时，消息的所有权是松散的)很好地权衡了效率，验证和可表达性。
I think the channel semantics (lose ownership of a message when it is sent) is a sweet spot in the trade-off among efficiency, verification, and expressiveness.
对于更好的错误消息来说，我们需要知道表达式的位置。
For a better error message, you need the expression's location.
埃默里大学著名灵长类动物学家法兰斯·德瓦尔认为：不只是猫科和犬类，甚至是老鼠也能表达恻隐之心以及其他情感【消息来源：科技美国】。
Frans B.M. DE Waal, a noted primatologist at Emory University, says that a variety of animals — not just cats or dogs, but even rats — feel empathy and other emotions [Source: Scientific American].
我寻找构成所寻找模式的正则表达式，然后使用注入的特殊消息来打印该磁盘报告行。
I look for a regular expression that makes the pattern I am looking for, and then print the line of the disk report with a special message that gets injected.
错误消息中显示的原因码 “XUTY0008” 表示 “替换表达式的目标节点不是单一节点”。
The reason code "XUTY0008" shown in the error message quickly points you to the fact that "the target node of a replace expression is not a single node".
任务输出消息也可以通过XPath表达式进行访问。
The task output message can be accessed via XPath expressions as well.
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。
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
可选地，后面还可以跟着一个前缀为反斜杠的XPath表达式，以仅访问该消息部分的特定元素。
Optionally, there can follow an XPath expression prefixed by a backslash to access only a specific element of the message part.
可选地，后面还可以跟着一个前缀为反斜杠的XPath表达式，以仅访问该消息部分的特定元素。
Optionally, there can follow an XPath expression prefixed by a backslash, to access only a specific element of the message part.
此外，还可以后跟一个XPath表达式，仅访问消息（部分）的特定元素。
Optionally, there can follow an XPath expression to access only a specific element of the message (part).
从输入或输出消息获得的任何数据元素都可以通过使用XPath表达式进行引用。
Any data elements obtained from an input or output message can be referenced by an XPath expression.
从输入或输出消息获得的任何数据元素都可以通过使用XPath表达式进行引用。
Any data elements obtained from an input or output message can be referenced by an XPath expression.
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