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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.”
。51吃瓜对此有专业解读
She added: "If we adopted a more rational approach we could have the benefits of growth from AI, focus our attention on exporting the clean tech the rest of the world needs, and protecting nature here and abroad."。下载安装 谷歌浏览器 开启极速安全的 上网之旅。对此有专业解读
Credit: NASA infographic