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高考 CET-4 CET-6 TOEFL BNC: 7542 COCA: 8298
sharpensharpenD.J.:[ˈʃɑ:pən]K.K.:[ˈʃɑrpən]vt. & vi.1.(使)变锋利; 削尖, 磨快Knives can be sharpened by grinding them against a rough stone.刀能在一块粗石上磨快。

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