The “Knocking on Wood” Wikipedia page mentions Roud’s conclusion, and this claim of a 19th century origin has circulated online as the final say on the matter. If you go back to the original, though, Roud’s proposal actually ends on an ambivalent note: “Before this theory [of 19th century origins] can be finally accepted, however, an examination of the history of European forms of this custom would be advisable.”
"Those that fail to do this – or ignore legally binding requests from us – should expect to face fines," he added.
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国内文旅产业业的未来增长极，在广阔的三四线城市及县域。这里蕴藏着最独特的自然景观与最原真的文化体验，却长期受困于数字鸿沟，成为“沉睡的宝藏”。线上能见度低、产品信息简陋、服务标准不一、支付方式受限，让再浓郁的酒香也很难飘出深巷。
宽容从来不是单向的索取，而是双向的修行。一次两次，人家付之一笑，三次四次，是可忍孰不可忍？宽容是有限度的，忍耐是有底线的，再宽厚的胸怀，也经不起反复消耗；终有一天，这份宽容会消失殆尽，留下的只有疏远与冷漠，更可能是人家的反戈一击。