perforations中文什么意思

齿孔

• perforations adding:    补孔
• semi-perforations:    半穿空
• silent perforations:    无声片片孔

例句与用法

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1. The dangerous type chronic otitis media occurs with pars flaccida and marginal perforations .
   慢性中耳炎的危险型可出现鼓膜松弛部的穿孔和鼓膜边缘性穿孔。
2. Involvement of the small bowel by primary or metastic neoplasms may occasionally be followed by perforation .
   原发性或转移性肿瘤累及小肠也偶可继发穿孔。
3. About 15 to 20 percent of patients who require treatment for perforation or bleeding will not have an antecedent history of ulcer pain .
   为出血或穿孔而需治疗的病人中，约1520以往无溃疡疼痛的病史。
4. Graphic technology - perforations for printing plates
   图形技术.印刷平板打孔
5. Screen plants - codification for designating perforations
   筛板筛孔的标记方法