perforation
英 [,p??f?'re??n]
美[,p?f?'re??n]
英英釋意
- 1. a line of small holes for tearing at a particular place
- 2. a hole made in something;
- "a perforation of the eardrum"
- 3. the act of punching a hole (especially a row of holes as for ease of separation)