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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.”
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The Indian government did not publicly cite a reason for the move, and it was not immediately clear whether the action was linked to a cybersecurity concern, copyright complaint, or another issue. It was also unclear how long the restrictions would remain in place.
中国驻悉尼总领馆经商处参赞叶威致辞说，中澳关系近年来实现转圜，给两国人民带来实实在在福祉。期待澳大利亚工商界积极组织更多企业参加进博会，涵盖更广泛行业领域，分享中国市场机遇与红利。