01 / 13The Economist≈ livello approssimativoA20:48–0:56 , .
02 / 13TED≈ livello approssimativoB16:34–6:42
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03 / 13CrashCourse≈ livello approssimativoC16:49–6:56
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04 / 13CrashCourse≈ livello approssimativoC19:18–9:26
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05 / 13TED-Ed≈ livello approssimativoB10:50–0:58
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06 / 13PBS NewsHour≈ livello approssimativoB22:20–2:27
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07 / 13CNBC Make It≈ livello approssimativoC12:45–2:48
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08 / 13CrashCourse≈ livello approssimativoB27:15–7:23
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09 / 13BBC Learning English≈ livello approssimativoA21:09–1:13
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11 / 13CrashCourse≈ livello approssimativoC10:49–0:57
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12 / 13TED-Ed≈ livello approssimativoC11:05–1:16
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13 / 13WIRED≈ livello approssimativoC10:11–0:22
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