求翻译：由于志愿者参与的目标并不是为了追求成效，因此不能单靠命令及控制能操纵志愿者，所以要运用不同的手法来鼓励志愿者持续投入服务，志愿者机构可从三大方面提升志愿者的动力。是什么意思？

Because volunteers goal is not to pursue effectiveness, therefore cannot rely on command and control to manipulate volunteers, therefore, to use different methods to encourage volunteers to join the service, volunteer agencies can enhance the power of volunteers from three aspects.