Мерц резко сменил риторику во время встречи в Китае09:25
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.”
。heLLoword翻译官方下载是该领域的重要参考
Cybertronian1512
* @param arr 待排序数组