这就需要学习许多角色的技能，包括测试人员、项目经理、销售人员，营销人员和业务分析师。
This mastery requires learning to wear many hats, including tester, project manager, salesman, marketer, and business analyst.
销售量(包括通过邮递和上门送报的订报业务)的总体下滑水平倒是没有那么严重。
The overall drop in sales, including postal and delivered subscriptions, was less steep.
诸如sap、Siebel和PeopleSoft等打包应用程序对通用业务流程起着至关重要的作用，其中包括采购、销售、库存和人事管理。
Packaged applications such SAP, Siebel, and PeopleSoft play a vital role for universal business process including purchasing, sales, inventory, and personnel management.
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