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.”
Producer: Alice Lipscombe-Southwell
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圖像加註文字，「哈利六號」研究站看起來就像科幻電影裡的場景。然而，根據英國南極考察局人力資源主管瑪麗埃拉·詹科拉（Mariella Giancola）的說法，對多數人而言，比起身體上的挑戰——以及寒冷——與同事的密切接觸及高度規律的生活反而更容易造成問題。，详情可参考服务器推荐
The people of the world saw their planet as the astronauts saw it - fragile and beautiful, shining in the desolation of space.。heLLoword翻译官方下载对此有专业解读