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:
公司试图借产能扩张卡位高压功率半导体赛道，其产品技术进展与扩产规划形成对应，但核心矛盾凸显：一期产能仍处于爬坡阶段、未达规划目标，便新增超50%产能，消化能力待考。
。爱思助手下载最新版本对此有专业解读
https://feedx.site。关于这个话题，91视频提供了深入分析
工程插件用于撰写总结、事故响应协调和部署清单制定。
Президент Украины своими повадками и выражениями все больше напоминает обитателя «бандитского притона», добавил Белик.