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.”
是囿于一时一事的得失，还是着眼打基础、利长远的实绩？
，这一点在雷电模拟器官方版本下载中也有详细论述
Никита Абрамов (Редактор отдела «Россия»)
02:47, 28 февраля 2026Культура