secondary liver transplantation

例句：

1. 1.The patient was referred to the hospital fora secondary liver transplant.
   患者被转诊到医院进行次级肝脏移植。
2. 2. The surgeryis complex and requires specialized knowledge and skills.
   手术复杂，需要专门的知识和技能。
3. 3. The successrate of secondary liver transplantation has improvedsignificantly in recent years.
   近年来，次级肝脏移植的成功率显著提高。