Working as a volunteer brings great joy to me.
做志愿者给我带来极大的快乐。
He also spent 35 years as a volunteer firefighter.
他也花了35年做一名消防志愿者。
Have you ever participated in volunteer activities?
你参加过义工活动吗？
I helped launch a volunteer organization on campus.
我帮助组建了一个校园志愿者组织。
He likes traveling but he works as a volunteer too.
他喜欢旅行，但他也做志愿者。