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.”
Space exploration
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數據顯示，2024年中國人在美國的申請庇護者的數目當中排名第八，在整體320萬尋求庇護者當中佔約4.6%。