Managers face a host of new business realities, such as changing patterns of employment that include an explosion of outsourcing and new alliances.
译文：管理人员要面临一大堆新拓展的实际业务，比如，包括大幅度增加的外包和新联盟等种种不断变化的工作模式。

Managers face a host of new business realities, such as changing patterns of employment that include an explosion of outsourcing and new alliances.
译文：管理人员要面临一大堆新拓展的实际业务，比如，包括大幅度增加的外包和新联盟等种种不断变化的工作模式。

译文改进：管理人员面对的是商界前所未有的种种事实，诸如就业的模式不断变化，包括外购、重组等现象的猛增。