melanosis corii degenerativa

例句：

1. 1. Melanosis is a condition that occurs when the skin becomes darker due to the accumulation of melanin.
   黑化是一种由于黑色素积累而导致皮肤变黑的状况。
2. 2. The patient had melanosis on his left arm and leg.
   这位病人左臂和腿上都有黑化现象。
3. 3.Melanosis can be treated by laser surgery or topical creams.
   黑化可以通过激光手术或局部药膏进行治疗。