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Từ điển Oxford Advanced Learner 8th
speak up
▪ I. ˌspeak ˈup derived usually used in orders to tell sb to speak more loudly • Please speak up— we can't hear you at the back. Main entry: ↑speakderived ▪ II. ˌspeak ˈup (for sb/sth) derived to say what you think clearly and freely, especially in order to support or defend sb/sth Main entry: ↑speakderived
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