parental怎么理解？

Lungs In mice subjected to a lethal dose of lipopolysaccharide (LPS)-induced endotoxemia, treatment with intraperitoneal vitamin C (ascorbic acid or dehydroascorbic acid), improved survival and preserved pulmonary architecture and endothelial barrier function by attenuating the activation of nuclear factor kappa B, chemokine expression and microvascular thrombosis [29]. Similarly, in a mouse model of acute lung injury induced by abdominal peritonitis, parental intraperitoneal administration of vitamin C mitigated the pulmonary pro-inflammatory response, reduced coagulation abnormalities and enhanced lung epithelial barrier function and alveolar fluid clearance rate [30].

肺

在致死量脂多糖(LPS)诱导的内毒素血症小鼠中，用腹腔注射维生素C（抗坏血酸或脱氢抗坏血酸）治疗，通过减弱核因子κB的活化、趋化因子表达和微血管血栓形成，改善了存活率，并保留了肺结构和内皮屏障功能。同样，在由腹膜炎诱导的急性肺损伤小鼠模型中，亲代腹膜内给予维生素C减轻了肺促炎反应，减少了凝血异常，并增强了肺上皮屏障功能和肺泡液体清除率。

parental怎么理解？谢谢