The “Knocking on Wood” Wikipedia page mentions Roud’s conclusion, and this claim of a 19th century origin has circulated online as the final say on the matter. If you go back to the original, though, Roud’s proposal actually ends on an ambivalent note: “Before this theory [of 19th century origins] can be finally accepted, however, an examination of the history of European forms of this custom would be advisable.”
Медведев вышел в финал турнира в Дубае17:59
。关于这个话题，服务器推荐提供了深入分析
其实目前AI面对的问题和10年前手机市场遇到的一样。高端不走量，低端没利润。
2024年12月23日 星期一 新京报
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