voluntarily

副词 voluntarily:

1. out of your own free will

1. He made the promise quite voluntarily.
   他完全自愿地作出了承诺。
2. An act of self-mortification or devotion performed voluntarily to show sorrow for a sin or other wrongdoing.
   苦行，布赎一种用来表示悔罪或对过失错误的赎罪的自我惩罚或忏悔的行为
3. Something that is bestowed voluntarily and without compensation.
   礼物，赠品主动给予并不要报偿的东西
4. The government calls on the youth to donate their blood voluntarily.
   政府号召青年义务献血。