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02 / 19Lex Clips≈ livello approssimativoA20:40–0:48
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03 / 19The Economist≈ livello approssimativoB21:37–1:42
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04 / 19WIRED≈ livello approssimativoB111:27–11:31
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05 / 19TED≈ livello approssimativoB18:14–8:16
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06 / 19PBS NewsHour≈ livello approssimativoB12:04–2:10
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07 / 19The Economist≈ livello approssimativoB10:28–0:39
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08 / 19PBS NewsHour≈ livello approssimativoC15:24–5:28
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11 / 19CrashCourse≈ livello approssimativoB210:14–10:23
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12 / 19TED≈ livello approssimativoB14:08–4:16
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13 / 19TED≈ livello approssimativoB27:45–7:48
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14 / 19Big Think≈ livello approssimativoC113:05–13:14
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17 / 19BBC Ideas≈ livello approssimativoB11:31–1:40
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19 / 19PBS NewsHour≈ livello approssimativoC13:18–3:31
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