我在学校参加了许多活动，既有学校级的，也有高一级的。

At college, I have participated in a lot of activities both at the collegiate level and the departmental level.

youdao

她参加了许多课外活动。

She's involved in many extra-curricular activities.

《牛津词典》

我参加了许多学生活动。

I took part in many student activities.

youdao

she's been published a lot recently. She does a lot of like, talk-shows and stuff,

她最近出版了很多东西。她也参加了许多活动，诸如脱口秀，

我喜欢的教授 - SpeakingMax英语口语达人