liver being bold and firm viscera

例句：

1. 1. The liver is responsible for filtering toxins from the blood.
   肝脏负责过滤血液中的毒素。
2. 2. He had a liver transplant last year.
   他去年做了肝脏移植手术。
3. 3. The doctor advised him to avoid alcohol for his liver's sake.
   医生建议他为了肝脏的健康，避免饮酒。