A: 你对人的皮肤有什么了解吗？

B: 我知道皮肤是人体最重要的一部分，因为它是抵御外界因素的第一道防线。

A: 作为人体的最大器官，皮肤也会发生一些问题。

B: 是的。有些皮肤问题虽不会引起身体疼痛，但会通过影响皮肤的外观造成患者情绪上的痛苦。

A: 白癜风就是很好的例子。这是一种使皮肤的一些区域色素脱失的病。

B: 什么因素导致白癜风这种皮肤病？

A: 白癜风的病因尚不明了，但研究表明它可能源于自身免疫、遗传、神经或病毒因素。

B: 常见的皮肤疾患还有痤疮、湿疹、牛皮癣等，但最危险的就是一种被称为黑色素瘤的皮肤癌。

A: 为什么黑色素瘤是最危险的？

B: 这是因为与皮肤癌相关的绝大多数死亡是由它引起的。

What do you know about  the human skin?

I know the skin is one  of the most important parts of the body, because it is the first line of  defense against external factors.

As the largest organ of  the body, the skin can have some problems.

Yes. Some skin disorders  do not cause any physical pain, but they can cause emotional pain by affecting  the appearance of the skin.

Vitiligo is a case in  point. This is a condition that causes depigmentation of sections of skin.

   What is the cause of the skin disorder vitiligo?

The cause of vitiligo is  unknown, but research suggests that it may arise from autoimmune, genetic,  neural, or viral causes.

Why is melanoma the most  dangerous skin disorder?

That’s because it causes  the majority of deaths related to skin cancer.