reverie       
noun [ C or U ]  literary uk/ˈrev.ər.i/ us/ˈrev.ɚ.i/
 幻想;梦想;白日梦
(a state of having) pleasant dream-like thoughts
  He was lost in reverie until he suddenly heard someone behind him. 他陷入了沉思,直到突然听到背后有人。 
 Synonym: daydream 
 
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