1. 孔屑在紙帶或數(shù)據(jù)卡片上打孔所產(chǎn)生的小紙屑或硬紙片
   Small pieces of paper or cardboard generated by punching holes in paper tape or data cards.
2. 信尾信封背面可拆掉的附加部分，其上有打孔的邊緣和特定的市場信息或訂購單
   A detachable extension to the back of an envelope, having a perforated edge and special marketing information or an order form on it.
3. 他們用沖床在金屬板上打孔。
   They cut holes on the sheet of metal with a punch press.
4. 售票員用剪票夾在他的汽車票上打孔。
   The conductor punched his bus ticket.

打的英語翻譯：

孔的英語翻譯：