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.”
1. Jasper Ai(Formerly known as Jarvis)
，更多细节参见旺商聊官方下载
But other stuff…? It was just goofing off:
Что думаешь? Оцени!
。Line官方版本下载对此有专业解读
More on this storyMum felt 'alone' on island after boy's diagnosis
人 民 网 版 权 所 有 ，未 经 书 面 授 权 禁 止 使 用。关于这个话题，夫子提供了深入分析