day-dream
n idle and pleasant thoughts that distract one's attention from the present 白日梦
She stared out of the window, lost in day-dreams. 她凝视窗外, 陷入白日梦中. v [I, Ipr]
~ (about sth) enjoy such thoughts 想入非非; 空想; 幻想
He sat in the classroom, day-dreaming (about the holidays). 他坐在教室里幻想著（度假）.