名詞 day dream:

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

動詞 day dream:

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

1. The student was unable to answer the question because he had spent most of the lecture in a day dream.
   這個學生回答不出問題，因為在講座進行的大部分時間內(nèi)，他都在想入非非。