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。
Clearly defined centrosomes have been observed in some cells . 在一些细胞中观察到界限清楚的中心体。
The chest x - rays and computed tomography revealed a well - defined intensive enhanced mass in the left middle mediastinum with necrotic changes and calcification within it 胸部x光摄影及电脑断层扫描发现在她的左侧纵膈腔有一界限清楚的肿块,肿块内并有坏死及钙化。
This magnetic resonance imaging ( mri ) scan of the pelvis in sagittal view demonstrates a large discreet leiomyoma of the upper posterior myometrium , seen just anterior to the rectosigmoid colon Mri示盆腔矢状面,于后上方子宫肌层可见一体积大,界限清楚的子宫肌瘤,后方紧邻乙状结肠。