在很多情况下，活动包括非关键的任务步骤，但能提供更高的保障。
In some cases, activities contain steps that are not critical to completing the task, but can provide higher assurance levels.
在很多情况下，活动包括非关键的任务步骤，但能提供更高的保障。
In some cases, activities contain steps that are not critical to completing the task, but can provide higher assurance levels.
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