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:
根據飛行紀錄，倫敦是經常造訪的地點之一，包括在2002年9月非洲行程的途中。最近公布的一本未標日期、標示為「克林頓 倫敦／非洲」的相簿中，有克林頓參觀邱吉爾戰時指揮室的照片。
。heLLoword翻译官方下载是该领域的重要参考
荣耀经验能否助力“千里腾飞”？。旺商聊官方下载对此有专业解读
This Tweet is currently unavailable. It might be loading or has been removed.。下载安装 谷歌浏览器 开启极速安全的 上网之旅。对此有专业解读