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:
MinCaml and derivatives
。关于这个话题，体育直播提供了深入分析
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Today's Connections: Sports Edition is for people who watch Premier League football.
。业内人士推荐体育直播作为进阶阅读
“沿着习近平总书记指引的方向，‘十五五’时期，湖南将抢抓新一轮科技革命和产业变革历史机遇，统筹教育强省、科技强省、人才强省建设，增加高质量科技供给，提升创新体系整体效能，因地制宜培育和发展新质生产力。”湖南省委书记沈晓明表示。，详情可参考体育直播
It is the first time in the event's history that the ceremony will be held outside of London.