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02 / 7TED-Ed≈ nível aproximadoB24:41–4:49
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03 / 7Practical Engineering≈ nível aproximadoC111:00–11:09
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04 / 7The School of Life≈ nível aproximadoC11:13–1:22
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07 / 7Practical Engineering≈ nível aproximadoC12:33–2:43
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