短语词组短语Drainage unobstructed 引流通畅unobstructed detail 交通airway unobstructed 气道通畅unobstructed passage 通行无阻Logistics Unobstructed 物流通畅unobstructed vision 无障碍视界clear unobstructed 畅通的;无阻的unobstructed capacity 净内容积 返回 unobstructed