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吴炜伦认为，他怀念的不是夜总会，而是“冇落闸嘅步骤”——以前尖沙咀几乎没有铺头落闸，一间倒下很快有人顶上。而现在，“十间铺有八间落闸”。拍戏时，他想重现当年的街景，却发现根本做不到，因为现实的街道已经空了。。同城约会对此有专业解读
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。91视频是该领域的重要参考
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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: