一个有效的服务计划的四个步骤是什么？
计划及执行一个有效的服务计划应有哪些步骤？
What steps must be taken to plan and implement an effective service project?
公司计划在星期一宣布票价保护，这项服务保证在网上公布的的票价在一周内有效，否则机票预价就没有什么用了。
The company planned on Monday to announce fare Guard, a service that guarantees that an airfare listed on the site will remain valid for a week, or Farecast will make up the difference.
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