third-degree

例句：

1. 1.The third-degree burns are the most severe.
   三级烧伤是最严重的。
2. 2. He is a third-degree black belt in karate.
   他在空手道中是黑带三段。
3. 3. She was in the third-degree when she fell from the tree.
   她从树上摔下来时处于三度昏迷状态。