Tra từ ballpoint - Từ điển Oxford Advanced Learner 8th

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Từ điển Oxford Advanced Learner 8th

ballpoint ball·point [ballpoint ballpoints] BrE [ˈbɔːlpɔɪnt] NAmE [ˈbɔːlpɔɪnt] (also ˌballpoint ˈpen) noun a pen with a very small metal ball at its point, that rolls ink onto the paper compare Biro