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he cold knowledge of Dadai and Doctor has been completely upgraded, and bilingual subtitles have been added to the horizontal screen. Come and subscribe to us and share more interesting and fun knowledge----

Science, exploration, knowledge seeking! Here we share with you the most different wonders of the world. I hope that watching this channel can broaden your horizons and bring you wonderful enjoyment! Dadai and Doctor's channels will share with you the most interesting and mind-expanding content!

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Bilingual subtitles have been added to the horizontal screen, subscribe to us @Daidai_Doctor