求翻译：我们班要组织一次野炊活动，星期日上午8点在学校门口集中，然后出发，9点就开始爬山，十一点半在山顶吃午餐，午餐后自由活动，直到下午4点30分就返回。是什么意思？

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Our class was to be organizing a wilderness activities, Sunday 8:00 a.m. at the entrance door, concentrated, and then proceed to start hiking in the mountains and 9:11:30 lunch at the top of the hill, after lunch, free afternoon until 4:30 on return.

Our class must organize a camp cooking activity, in the morning 8 o'clock is centralized on Sunday in the school entrance, then embarks, 9 starts to climb a mountain, 11 and half have the lunch in the summit, after the lunch the free activity, until afternoon 4.30 minutes on returns.

To organize a picnic in our class activities on Sundays at 8 o'clock in the morning in the school entrance set, and set out, and started climbing at 9 o'clock, at 11:30 in the Hill for lunch, after lunch free until 4:30 P.M. returns.

To organize a picnic in our class activities on Sundays at 8 o'clock in the morning in the school entrance set, and set out, and started climbing at 9 o'clock, at 11:30 in the Hill for lunch, after lunch free until 4:30 P.M. returns.