不能保证实现的诺言，空中楼阁...

He can't help thinking it's all just "pie in the sky" talk.他禁不住想所有这些不过是“画饼充饥”的空话而已。What you said is only pie in the sky.你所说的实在是渺茫得很.To outlaw deficits is a pie in the sky.宣告赤字非法是空想....

pie in the sky的音标：pie in the sky的英式发音音标为：[pai in ðə skai]pie in the sky的美式发音音标为：[paɪ ɪn ði skaɪ]...