coca20000

Frequency ˈfri:Kwənsi ˈfrikwənsi N.["频繁性","[数][物]频率，次数","频率分布

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Next card: Tobacco təˈbækəʊ təˈbækoʊ n.["烟草，烟叶","烟草制品","卷烟","纸烟

Previous card: Kræk crack vt.["破裂，打开","（使…）开裂","说（笑话）","开瓶 vi.["断裂，折断","碎裂声，爆裂声","镜子破裂了","失去控制，衰退 n.["裂缝","试图","缝隙","（可听到响声的）重击 adj.["训练有素的","技艺高超的","优秀的","一流的

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