Peptic ulcer is a sharply circumscribed loss of tissue.是什么意思？

Peptic ulcer is a sharply circumscribed loss of tissue.

消化性溃疡是一种界限清楚的组织损毁.

peptic

adj. 消化性的，助消化的，可消化的；

例句
Amylaceous most first by which is peptic digested?
淀粉最先由哪个消化器官消化?

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。

is

vt.& vi. 是（be的三单形式；n. 存在；

例句
Bollinger 'RD' is a rare, highly prized wine.
博林格RD香槟是一种名贵的备受推崇的葡萄酒。

sharply

adv. 严厉地，明确地，锋利地，突然地；

例句
She braked sharply to avoid another car...
她为了躲另一辆车而紧急刹车。

circumscribed

adj. [医]局限的：受限制或限于有限空间的；v. 在…周围划线( circumscribe的过去式和过去分词 )，划定…范围，限制，限定；

例句
Objective To investigate the ultrasonographic characteristics of circumscribed choroidal hemangioma ( CCH ).
目的探讨孤立型脉络膜血管瘤的 超声 诊断价值.

loss

n. 损失，减少，丢失，遗失，损耗，亏损，失败；

例句
The company cannot accept responsibility for loss or damage.
公司不承担丢失或损坏的责任。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

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

tissue

n. 薄纸，棉纸，[生]组织，一套；

例句
Before applying make-up, blot the face with a tissue to remove any excess oils...
上妆前，先用面巾纸把脸上多余的油吸干。