I do some voluntary work at the local hospital.
我在当地医院从事一些义务性工作。
I'd prefer just to do some voluntary work.
我更喜欢做一些志愿工作。
A gap year is a period of time when high school graduates can go traveling, do some voluntary work or take up a part-time job before they further their study in universities.
间隔年是指中学毕业生在上大学之前去旅游、做义工或做临时工的一段时间。
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