wound periderm

例句：

1. 1. The wound periderm was still swollen and tender to the touch.
   伤口的外层组织仍然肿胀且触感敏感。
2. 2. The doctor advised him to keep the wound periderm clean and dry.
   医生建议他保持伤口外层组织清洁干燥。
3. 3. The patient's wound periderm began to close over the next few days.
   患者伤口外层组织在接下来的几天开始愈合。