His studies at harvard found that when volunteers played the game tetris for hours a day , 60 % reported dreaming about it at least once as they were falling asleep .

他在哈佛进行的研究发现，当志愿者一天玩数小时俄罗斯方块时，60%的志愿者报告说他们在睡着时至少梦到过一次俄罗斯方块。