否则，您应该锁定对资料存放区中工作流程执行个体状态的存取。
Otherwise, you should lock access to the workflow instance state in your data store.
取得状态活动集合，状态机器工作流程执行个体已透过这些活动进行转换。
Gets a collection of state activities that the state machine workflow instance has transitioned through.
目前，实作追踪参与者的任何类别皆能够以工作流程执行个体进行登录，以接收追踪记录。
Currently, any class that implements the tracking participant can be registered with the workflow instance to receive tracking records.
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