文 | 闻旅派，作者 | 郭鸿云，编辑 | Sette
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。WPS官方版本下载对此有专业解读
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:。关于这个话题，雷电模拟器官方版本下载提供了深入分析
Gerd Baumgarten