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:
● “내 기기만 조종하려다”…24개국 6700대 동시 응답
，这一点在雷电模拟器官方版本下载中也有详细论述
Израиль нанес удар по Ирану09:28，这一点在服务器推荐中也有详细论述
想象一下，你用饼干模具在面团上按了一下，这就是 ExtrudeGeometry 做的事。。关于这个话题，Line官方版本下载提供了深入分析