1. voluntary motions; voluntary muscles. 
   有意识的运动；随意肌。
2. price of voluntary sales 
   义务交售价格
3. man is a voluntary agent; participation was voluntary; voluntary manslaughter; voluntary generosity in times of disaster; voluntary social workers; a voluntary confession. 
   这个人是自愿代理的；自愿参加；故意杀人犯在天灾人祸时期甘愿慷慨解囊；义务社区工作；主动认罪。
4. import and export licence system 
   进出口许可证制度
5. A voluntary hostage; voluntary community work. 
   志愿人质；义务社区工作

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• 1. 自愿许可
  {n.}船舶吨税执照 voluntary licence...自愿许可 wireless broadcasting licence...无线电广播证 withdrawal of one's driving licence
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