The doctor diagnosed my illness as a rare skin disease.是什么意思？

The doctor diagnosed my illness as a rare skin disease.

医生诊断我的病为罕见的皮肤病。

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

doctor

n. 医生，大夫，博士，神学家，医疗设备；vt.& vi. 医疗，行医；vt. 修理，装配，假造，搀杂，修改，修饰；

例句
A family doctor will be able to advise on suitable birth control.
家庭医生能够就合适的节育措施提出建议。

diagnosed

v. 诊断( diagnose的过去式和过去分词 )；

例句
Perhaps that illness, diagnosed as fatal, gave him a sense of living on borrowed time.
也许是那种被诊断为绝症的疾病让他有了时日无多之感。

my

adj. 我的(I的所有格形式)；int. 啊呀，天啊；

例句
Racial discrimination is abhorrent to my council and our staff...
我的顾问班子和全体工作人员都对种族歧视深恶痛绝。

illness

n. 疾病，某种具体疾病，不健康；

例句
Although his mental illness had coincided with his war service it had not been caused by it...
虽然他的精神病刚好在他参战期间发作，但并不是由此引起的。

as

adv. 同样地，一样地，例如；prep. 作为，以…的身份，如

例句
As far as I can recall, Patti was a Smith.
我记得帕蒂是姓史密斯的。

rare

adj. 罕见的，特殊的，半熟的；半生的，稀薄的，经过稀化的，三分熟；

例句
It was one of his rare attempts at humour.
那是他极不常见的想要表现幽默的一次。

skin

n. 皮，皮肤，（蔬菜，水果等）外皮，毛皮；vt. 剥皮，削皮，擦破皮，擦伤，欺骗；vi. 使愈合，长皮；adj. <俚>色情的；

例句
My skin was abraded and very tender.
我擦破皮了，一碰就疼。

disease

n. 疾病，弊端，不安；vt. 传染，使…有病；

例句
In many cases the disease will clear up of its own accord.
这种病很多情况下会自愈。