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BNC: 25217 COCA: 18752

perforation

1 ENTRIES FOUND:
perforation /ˌpɚfəˈreɪʃən/ noun
plural perforations
perforation
/ˌpɚfəˈreɪʃən/
noun
plural perforations
Learner's definition of PERFORATION
[count] : a small hole or series of small holes in paper, cardboard, etc.齿孔;小孔often plural常用复数
medical : a hole in part of the body caused by an accident or disease穿孔
[count]
[noncount]

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