求翻译：加入你是高三2班班长，你班要在5月4号即下星期六去庐山郊游。请你拟一份通知，准备向同学们宣读。1郊游日期5月4日下星期六2主要内容攀登比赛摄影等3早餐后8点做校车出发午餐自带下午3点回校4欢迎全体同学参加。凡参加者先登记并是什么意思？

Join your high 32 monitor, your class May 4, the next Saturday to Lushan outing. Please prepare a notice prepared to read out to the students. 1 picnic date of May 4 next Saturday 2 main content climbing competition photography, 3 8 points do school bus departure after breakfast lunch comes with 4 form at 3 o'clock in the afternoon all the students are welcome to join. Where the participants to register and