Have you ever participated in volunteer activities?

你参加过义工活动吗？

I participated volunteer activities on the recommendation of you.

根据你的建议，我参与了志愿活动。

Volunteer activities are of tremendous benefit to both those in need and to the whole society.

志愿活动对有需要的人和对整个社会都有巨大的好处。

I tried to persuade them to take part in the volunteer activities, but they weren't the least interested.

我试图说服他们一起参与志愿活动，可他们一点也不感兴趣。

You have to volunteer activities?

你参加过义工活动吗？