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https://cosmodox.co/2020/07/26/2020w28-29%ef%bc%9a%e5%91%a8%e8%ae%b0%e7%ac%ac%e5%8d%81%e5%85%ab%e3%80%81%e5%8d%81%e4%b9%9d/
2020W28/29:周记第十八、十九