sodium hydroxide burn

例句：

1. 1. The patient was burned by the hot liquid.
   病人被热液体烧伤了。
2. 2. The chemical reaction caused a sodium hydroxide burn on his skin.
   化学反应导致他皮肤上起了氢氧化钠烧伤。
3. 3. The firefighters used water to extinguish the sodium hydroxide burn.
   消防员用水扑灭了氢氧化钠烧伤。