n. composition (often improvised) for a solo instrument (especially solo organ) and not a regular part of a religious service or musical performance
a. of your own free will or design; done by choice; not forced or compelled
a. controlled by individual volition
a. 自动的, 自愿的, 故意的, 志愿的, 自发的
n. 自愿行动, 志愿者, 自由调
1. She decided to do voluntary work at the animal shelter.
她决定在动物收容所做志愿者工作。
2. Many students participate in voluntary activities during their summer break.
许多学生在暑假期间参加志愿活动。
3. The organization relies on voluntary donations to support its programs.
该组织依靠自愿捐款来支持其项目。