01 / 14TED-Ed≈ mức xấp xỉB20:06–0:12 ’s .
02 / 14BBC Ideas≈ mức xấp xỉB21:51–1:57
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03 / 14NBC News≈ mức xấp xỉB10:47–0:51
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04 / 14TED-Ed≈ mức xấp xỉB24:23–4:32
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05 / 14PBS NewsHour≈ mức xấp xỉC15:26–5:33
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06 / 14NBC News≈ mức xấp xỉB10:08–0:12
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07 / 14BBC Ideas≈ mức xấp xỉB20:06–0:10
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08 / 14TED-Ed≈ mức xấp xỉB11:02–1:12
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09 / 14PBS NewsHour≈ mức xấp xỉB24:54–5:02
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10 / 14Big Think≈ mức xấp xỉB20:44–0:50
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11 / 14WIRED≈ mức xấp xỉB10:28–0:30
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12 / 14Big Think≈ mức xấp xỉB210:34–10:47
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13 / 14WIRED≈ mức xấp xỉB20:46–0:56
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14 / 14NBC News≈ mức xấp xỉB21:18–1:30
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