10212 서연우 by 서연우 https://padlet.com/2020102124/7nib1tyqlcrhesie 과학 A en-us 2020-10-26 23:25:41 UTC 2023-04-28 03:12:40 UTC hello@padlet.com 42강 2020102124 https://padlet.com/2020102124/7nib1tyqlcrhesie/wish/864048659 https://youtu.be/auC_GZDn1os

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