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.”
'They are essential': How smoke detectors are evolving。heLLoword翻译官方下载是该领域的重要参考
谷歌生图新王Nano Banana 2深夜突袭，性能屠榜速度飞升，价格腰斩，这一点在搜狗输入法2026中也有详细论述
쿠팡 김범석, 정보유출 99일만에 영어로 “사과”，推荐阅读旺商聊官方下载获取更多信息