The ulcer has perforated.是什么意思？

The ulcer has perforated.

溃疡已穿孔.

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。

ulcer

n. <医>溃疡，腐烂物，道德败坏；

例句
The ulcer had been troubling her for several years.
溃疡已经折磨她好几年了。

has

v. 有( have的第三人称单数 )，（亲属关系中）接受，拿，买到；

例句
...the operation a patient has had.
病人做过的手术

perforated

v. 穿孔于，在…上打眼( perforate的过去式和过去分词 )，（在纸张等上）打齿孔[孔眼线]；

例句
The ulcer has perforated into the lessor omental bursa.
溃疡穿透到小网膜囊.