自愿做
1.volunteer for
2.is volunteer to clean
3.to do
自愿做某事
1.volunteer to do sth
2.volunteer to do
3.volunteer troop
4.volunteer for sth
自愿做某事;志愿者
1.volunteer
自愿(做某事)志愿者
1.volunteer
自愿做某事,主动提出做某事
1.offer to do sth
自愿做
1.volunteer for
2.is volunteer to clean
3.to do
自愿做某事
1.volunteer to do sth
2.volunteer to do
3.volunteer troop
4.volunteer for sth
自愿做某事;志愿者
1.volunteer
自愿(做某事)志愿者
1.volunteer
自愿做某事,主动提出做某事
1.offer to do sth