body scab

例句：

1. 1. He had a body scab on his arm that he couldn't seem to heal.
   他的手臂上有一个无法愈合的体痂。
2. 2. She applied some ointment to the body scab and waited for it to heal.
   她给那个体痂涂了一些药膏，等待它愈合。
3. 3. The doctor advised him to keep the body scab clean and dry to prevent infection.
   医生建议他保持体痂干净干燥，以防止感染。