使用解释器模式创建一个领域语言，翻译成特殊的代码。

Use the Interpreter pattern to create a domain-specific language that you translate into specific code.

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XPath解释器还包括扩展Gamma等的基本解释器模式的优化特性。

The XPath interpreter also includes optimization features that extend the basic interpreter pattern of Gamma et al.

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总的来说，如果你在命令行输入scala 而不输入文件名参数，解释器会运行在交互模式。

To summarize, if you type scala on the command line without a file argument, the interpreter runs in interactive mode.

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