voluntary act自愿行为
voluntaryadj.自愿的;志愿的n.(教堂礼拜仪式前后或进行期间的)乐器独奏
voluntary health insurance自愿健康保险
voluntary disclosure level自愿披露水平
voluntary higher education民办高等教育
voluntary obligatory right[法] 任意债权
voluntary academic activity自发学术活动
voluntary muscle power test随意肌肌力试验
voluntary purchase and sale[法] 任意买卖
voluntary cooperating study自主合作学习