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.”
В КСИР выступили с жестким обращением к США и Израилю22:46。业内人士推荐体育直播作为进阶阅读
，这一点在下载安装汽水音乐中也有详细论述
AFP via Getty Images。WPS官方版本下载对此有专业解读
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