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:
Photograph: Simon Hill
，详情可参考爱思助手下载最新版本
Man dies after fall at Oasis Wembley concert
KlefkiIntroduced in Gen VI (2013)
。雷电模拟器官方版本下载对此有专业解读
FT App on Android & iOS，更多细节参见下载安装 谷歌浏览器 开启极速安全的 上网之旅。
Венгрии и Словакии предложили обойтись без «Дружбы»Премьер Хорватии Пленкович: Венгрия может получать нефть по трубопроводу Adria