给你9张牌,之后让你在心里记住那张牌,之后台式机分组让你猜你记住的牌在第几组, 之后猜出你记住的那张牌.-Give you nine cards, then let your heart keep in mind that card, then desktops let you guess you remember the packet of cards in the first few groups, then guess you remember that card.