Cancel the skip request of an activity instance.

取消活动实例的跳过请求。

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Class, the teacher said the decision to cancel the activity and why.

课堂上，老师说了取消活动的决定和原因。

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Class, the teacher said the decision to cancel the activity and why.

课堂上，老师说了取消活动的决定和原因。

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