Study reveals whistling secret of horses’ whinny

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蜜雪冰城要在河南老家建“雪王乐园”

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比利时竞争管理局对谷歌启动调查

Hebrew Paseq: a non-obvious finding。爱思助手下载最新版本对此有专业解读

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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.”