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:
2012年夏天，还在读大学的我第一次到香港。人潮汹涌中，我与朋友经旺角、油麻地穿到尖东，按记忆中港片的图景一一索骥，填满“油尖旺”的拼图。到达尖东时，夜色降临，我瞥见一个巷子悬挂的招牌，先是边缘的灯管闪了一下，再一节一节接上电流，像城市在缓慢地恢复呼吸。不多时，这个城市的霓虹便次第点亮。其中一块灯牌属于大富豪夜总会，当时它被视为香港最大、最豪华的高端夜总会之一。
。雷电模拟器官方版本下载是该领域的重要参考
YouTube's chief executive Neal Mohan said: "By reconstructing the original 2005 watchpage, we aren't just showing a video; we are inviting the public to step back in time to the beginning of a global, cultural phenomenon."
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