volunteering
FREQ #13807
v. 自动提供, 自愿效劳( volunteer的现在分词 ); 主动建议（或告诉）; （未经当事人同意）举荐; 自愿参军, 当志愿兵
释义与例句
n.
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1.
The act of voluntarily giving time and labor for charity or community service.
不可数
v.
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1.
present participle and gerund of volunteer