All activities in between the source and the target are not activated by the workflow engine.

源和目标之间的所有活动不是由工作流引擎激活的。

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For example, if a purchase order is submitted that is over $10,000, the workflow engine may select a different Web service implementation than it would if the purchase order was for less than $10,000.

例如，如果提交的购买订单总额超过 $10,000，那么工作流引擎所选的 Web 服务实现就可能不同于为总额不足 $10,000 的购买订单所选的 Web 服务实现。

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The paper discusses how the workflow engine controls the business flow.

本文讨论了工作流引擎对实际流程的控制。

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