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#322090
講者：Speaker:
That is why the high-speed rails use QR code. It’s the same motivation, to not make the elderly wait too long.
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可引用的發言段落Citable transcript turn
講者：Speaker:
That is why the high-speed rails use QR code. It’s the same motivation, to not make the elderly wait too long.
j 下一段next turnk 上一段previous turn