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.
这两个元素可以很容易地定义为插件 xml 文件中的 Eclipse 核心表达式。
These two elements are easy to define as Eclipse core expressions in the plug-in xml file.
为mvel、ognl或者jruby等增加新的表达式计算插件也是非常容易的。
It's also very easy to plug in new expression evaluators for things like mvel, ognl, or jruby.
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