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BNC: 25217 COCA: 18752

perforation

Word family
per·fo·ra·tion /ˌpɜːfəˈreɪʃən $ ˌpɜːr-/ noun formal  
1 [countableC usually plural]HOLE a small hole in something, especially one of a line of holes made in a piece of paper so that it can be torn easily 孔〔尤指孔眼线上的孔〕
 the perforations in a sheet of stamps
一版邮票上的齿孔
2. [uncountableU]HOLE when something makes a hole or holes 穿孔;打齿孔;打眼
Examples from the Corpus
per·fo·ra·tion noun
Chinese
Syllable
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