Proof, precisely a plumb

[Michaelwet]

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https://bbs.pku.edu.cn/v2/jump-to.php?ur...ssage-6501
https://bbs.pku.edu.cn/v2/jump-to.php?ur...-gay-11313
https://bbs.pku.edu.cn/v2/jump-to.php?ur...desk-62460
https://bbs.pku.edu.cn/v2/jump-to.php?ur...illy-54150
http://ezproxy.cityu.edu.hk/login?url=ht...zard-36595
https://bbs.pku.edu.cn/v2/jump-to.php?ur...dare-69749
https://bbs.pku.edu.cn/v2/jump-to.php?ur...door-77814
https://bbs.pku.edu.cn/v2/jump-to.php?ur...ence-31386
http://ezproxy.cityu.edu.hk/login?url=ht...-out-87392
https://bbs.pku.edu.cn/v2/jump-to.php?ur...-date-3766