day dream

名词 day dream:

1. absentminded dreaming while awake
   同义词：reverie, revery, daydream, daydreaming, oneirism, air castle, castle in the air, castle in Spain

动词 day dream:

1. have a daydream; indulge in a fantasy
   同义词：dream, daydream, woolgather, stargaze
2. have dreamlike musings or fantasies while awake
   同义词：daydream, moon

1. The student was unable to answer the question because he had spent most of the lecture in a day dream.
   这个学生回答不出问题，因为在讲座进行的大部分时间内，他都在想入非非。