生成瘢痕

例句：

1. 1. The wound has healed over time, leaving a faint scaron his arm.
   伤口随着时间的推移愈合了，在他的手臂上留下了淡淡的疤痕。
2. 2. The oldpainting is covered in faded scarsfrom years of use.
   这幅旧画被岁月的痕迹覆盖，上面布满了褪色的疤痕。
3. 3. The doctor advised him to avoidthe sun and any other skin-damaging activities to prevent further scar formation.
   医生建议他避免阳光和任何其他可能导致皮肤损伤的活动，以防止进一步形成疤痕。