walking dream的用法和樣例：
例句
- The question can't be lightly dismissed as a fad or a dream.
不可輕率地認為這個問題是一個怪念頭或空想而不予考慮。 - His scheme for building a perpetual-motion machine is just a pipe dream.
他建造永動機的計劃只是空想罷了。 - Early retirement is a pipe dream for many.
早退是許多人都有的白日夢。 - When I was a child,I used to imagine myself to be a traveler in future,but that was only a day dream of a boy.
孩提時代，我總是想長大后要做個旅行家，不過那只是一個孩子的白日夢而已。
