JES：你可以将DSL理解为采用专门术语实现想法和概念交流的工具。
JES: You can think of a DSL as a means to communicate an idea or a concept in its own specific terms.
课程提出一系列的概念、框架和分析工具，使能更好理解如何管理服务运作。
A series of concepts, frameworks and analytic tools are provided to better understand the management of service operations.
隐喻是构建概念系统的有效工具，为人们理解抽象的经济语篇提供了简洁、形象和生动的思维方式。
Metaphor is an effective tool of constructing conceptual systems, which provides a vivid concise way for our understanding of the abstract concepts of economy.
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