coca20000

Problem ˈprɒbləm ˈprɑ:Bləm N.["问题","疑难问题","习题","引起麻烦的人 Adj.["成问题的","难处理的","关于社会问题的

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Next card: ˈevri ˈɛvri det.["每个","每","所有可能的","充足的 every

Previous card: Turn tɜ:n tɚn vt vi.["使转动","旋转","使改变方向","使不适 vt.["使变酸","使变换","使变为 n.["翻转","（路线或方向的）改变","机会

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