EXSLT试图囊括通常需要的多数扩展，比如日期处理、正则表达式和数学操作。
EXSLT attempts to cover the most commonly needed extensions, such as date processing, regular expressions, and mathematical operations.
它的叶子节点就好像一种略加扩展的源代码，而下一步便是把它转换为正则表达式引擎所使用的机器码。
Looking at just the leaf node, this resembles the source code to a fair extend. Next this is translated into the machine code of the regular expression engine.
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.
虽然其中的代码不是着重于从ResourceBundle提取正则表达式，但是它的确包含了一个扩展格式化文本域的默认行为的好例子。
Although the code doesn't focus on extracting regular expressions from a ResourceBundle, it does include a good example of extending the default behavior of the formatted text field.
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。
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.
Expect的扩展正则表达式功能非常强大，并且很容易通过代码确定格式。
Expect boasts extensive regular expression capabilities, and the formatting is easy to code.
附加的Firefox扩展可用于合并正则表达式搜索与其他文本高亮显示功能。
Additional Firefox extensions are available to incorporate regular-expression searches and other text-highlighting capabilities.
POSIX标准并不支持“扩展”正则表达式的后向引用，这是对标准的兼容扩展。
The POSIX standard does not support back-references for "extended" regular expressions, this is a compatible extension to that standard.
缓存会自动扩展以存储新的正则表达式。
The cache is automatically expanded to store new regular expressions.
缓存会自动扩展以存储新的正则表达式。
The cache is automatically expanded to store new regular expressions.
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