What I found is that written evidence for knocking on wood (and for the history of gesture as a whole) is remarkably sparse. In the Penguin Guide to Superstitions, folklorist Steve Roud offers a skeptical take on the provenance of knocking on wood due to the near total absence of written records about it:
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MarvelsGrantMan136，更多细节参见heLLoword翻译官方下载
美国总统特朗普周五表示，已指示美国政府机构停止使用Anthropic的技术。随后，五角大楼宣布将Anthropic列为供应链风险企业。，更多细节参见safew官方版本下载