Difficult healing wound

• 难愈性创面

Difficult healing wound的用法和样例：

例句

1. And It was observed that chitosan hydrogel effected the healing velocity and quality of cutaneous wounds in normal rats and delayed wounds in diabetic rats.
   并观察几丁糖水凝胶对正常大鼠皮肤创面和糖尿病大鼠难愈性创面愈合速度和质量的影响。