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.”
FT Digital Edition: our digitised print edition。业内人士推荐Line官方版本下载作为进阶阅读
在2026年的就业市场中，人工智能不再是一个独立的行业，而是全方位赋能千行百业的底层生产要素 [23]。对于求职者而言，职业安全感的来源已从“掌握特定技能”转向“具备快速学习与跨界融合的能力” [43, 44]。，推荐阅读WPS官方版本下载获取更多信息
近期，英国渣打银行等国际机构上调2026年中国GDP增长预期，主要依据之一是认为中国全要素生产率将持续提升。