Tra từ pen pal - Từ điển Oxford Advanced Learner 8th

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Từ điển Oxford Advanced Learner 8th

pen pal ˈpen pal [pen pal pen pals] BrE NAmE (especially NAmE) (BrE also pen·friend) noun a person that you make friends with by writing letters, often sb you have never met See also: ↑penfriend