The Celts believed the souls of the dead roamed the streets and villages at night. Since not all spirits were thought to be friendly, gifts and treats were left out to pacify the evil and ensure next years crops would be plentiful. This custom evolved into trick-or-treating.
凯尔特人相信死者的灵魂会在夜里出没在街道和村庄 。因为他们认为不是所有的灵魂都是友善的，所以就把礼物和好吃的留在外面安慰恶灵来确保来年的庄稼可以丰收。这种习俗演变成了trick-or-treating。
