perforation
中文来自 ECDICT
- n.
- 穿孔，孔眼，贯穿，贯通
释义（英文）
名词 Noun
- The act of perforating or the state of being perforated.
- Any opening in a solid object.
- (medicine) An abnormal opening in an organ, such as a rupture.
- A series of holes punched through something in order to assist in separating parts.
- (mathematics) That portion of a surface that remains after an open disk is removed from it.