unaccompanied
adj. 无伴奏的；无伴侣的；无伴随的
例句
No unaccompanied children allowed.
无大人带领的儿童不许进入。
《牛津词典》
Many of those unaccompanied children are orphans.
那些无人陪伴的孩子里有许多是孤儿。
《柯林斯英汉双解大词典》
Unaccompanied bags are either searched or removed.
单独运送的包或被检查，或被移走。
