1. 名詞
   穿孔, 針孔
   齒孔
   /以上複數為"perforations"/
   限定不可數名詞:
   貫穿
   

   同義字詞
   pinhole,pinprick,prick,punch,puncture,stab
   aperture,hole,opening,orifice
   

例句

1. I have about a 25% perforation in my ear.
2. When perforation heals, it turn into tattoo.
3. Next thing you know, you have a perforation .
4. Perforation of postage stamps began January 1854.
5. Following perforation , signs of peritonitis develop.
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