perforation

名词 perforation:

1. a line of small holes for tearing at a particular place
2. a hole made in something
3. the act of punching a hole (especially a row of holes as for ease of separation)

per.fo.ra.tion

n.（名词）
A hole or series of holes punched or bored through something, especially a hole in a series, separating sections in a sheet or roll.
孔：穿过某物的一个孔或一系列孔，尤指用以分割一张或一卷东西的一系列小孔

The act of perforating.
穿孔：穿孔的行动
The state of being perforated.
被穿孔：被穿孔的状态