① 我在大学里曾经参加过学生会、艺术团等组织（用英语怎么说）
我在大学里曾经参加过学生会、艺术团等组织的英文翻译
I have participated in the organization of student union, art troupe and so on in University.
[原文]我在大学里曾经参加过学生会、艺术团等组织
② 这次我们学校举办的校园艺术节的活动有歌咏比赛，乐器比赛和书画展的英语翻译
This campus arts festival held by our school has many activities, such as singing contest, Musical Instruments competition, and painting and calligraphy exhibition game.