dark crust

• 黑痂

dark crust的用法和样例：

例句

1. The mucus in my nose has dried up and forms dark yellow crusts.
   我鼻内粘液干掉结成深黄色硬痂。
2. Expose ends in partial-thickness burns when the crust desquamates and falls off.
   在部分厚度烧伤，痂皮剥脱和脱掉后，暴露即告结束。