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:
作为技术负责人，林俊旸被视为千问大模型的灵魂人物，他的离开最直接的影响就是引发了千问技术团队的一波密集离职。，推荐阅读体育直播获取更多信息
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The rewrite engine is an absolutely brilliant invention by John Brant and Don Roberts, introduced with the Refactoring Browser (see “A Refactoring Tool for Smalltalk”, 1997). It gives us AST-level matching and rewriting with astonishing power.，更多细节参见体育直播
2026-03-03 00:00:00:0本报记者 白光迪3014318510http://paper.people.com.cn/rmrb/pc/content/202603/03/content_30143185.htmlhttp://paper.people.com.cn/rmrb/pad/content/202603/03/content_30143185.html11921 给地下电缆做“体检”（新春走基层）