serious burn

例句：

1. 1. He suffered a serious burn while hiking in the forest.
   他在森林徒步时遭受了严重的烧伤。
2. 2. The patient was treated for a serious burn on his left hand.
   病人的左手被严重烧伤，接受了治疗。
3. 3.The firefighters were called to put out a serious burn on a young boy.
   消防员被召来扑灭一个年轻男孩身上的严重烧伤。