显示执行某个活动所花的时间长度。
只有在处于活动状态时才可以执行从某个活动实例跳出操作。
Jumping away from an activity instance can only be performed in an active state.
当工作需要由某个人执行时，可以使用人工任务活动。
A human task activity is used when work is to be performed by a person.
当工作需要由某个人执行时，可以使用人工任务活动。
A human task activity is used when work is to be performed by a person.
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