daydream
noun [ C usually singular ] uk/ˈdeɪ.driːm/ us/ˈdeɪ.driːm/
美梦，幻想，白日梦
a series of pleasant thoughts about something you would prefer to be doing or something you would like to achieve in the future
He never paid attention in class and seemed to be in a permanent daydream. 他在课堂上注意力总是不集中，好像一直在做白日梦似的。
I was just enjoying a daydream about winning the Nobel Prize for literature. 我只不过在幻想着自己获得了诺贝尔文学奖。