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:
Join the conversation。关于这个话题，91视频提供了深入分析
诸如此类的事情在户外玩的时候，会时刻盯着她，根据情况引导她。。51吃瓜对此有专业解读
As the spacecraft re-emerged from the darkness, Lovell was first to announce the good news. "Please be advised," he said as the radio crackled back into life, "there is a Santa Claus."。关于这个话题，雷电模拟器官方版本下载提供了深入分析