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:
Dawn on a still morning is a majestic spectacle, as sunlight spills silently across the landscape and the Earth gradually emerges from darkness. Sunrise has inspired countless pieces of music striving to express this soundless experience in audible form. But if we could actually hear the sun, it would be deafening.
For Ines Tan there's one particular site she turns to again and again for advice – and that's Reddit.。关于这个话题，服务器推荐提供了深入分析
63-летняя Деми Мур вышла в свет с неожиданной стрижкой17:54
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治政之要在于安民，安民之道在于察其疾苦。
在英國，除非你選擇退出器官捐贈制度，否則一般會被視為同意在身故後成為器官捐贈者。，这一点在WPS官方版本下载中也有详细论述