voluntary contributions自愿捐款
voluntary agreement自愿协议
词根:voluntary
adj.volunteer 志愿的
adv.voluntarily 自动地;以自由意志
n.volunteer 志愿者;志愿兵
vi.volunteer 自愿
vt.volunteer 自愿
3.Male economists overwhelmingly think the wage gap between men and women is largely the result of individuals'skills, experience and voluntary choices.
绝大多数男性经济学家认为,男女之间的工资差距在很大程度上是个人技能、经验和自愿选择所造成的结果。