without the owner present; not being watched or cared for 主人不在场的;无人看管(或照料)的 unattended vehicles 无人看管的车辆 Never leave young children unattended. 小孩绝不能无人看管。 He found the reception desk unattended. 他发现接待处无人看管。
Oxford Collocations DictionaryUnattended is used with these nouns:- vehicle