pipe dream

英 [ˈpaɪp driːm]

美 [ˈpaɪp driːm]

n. 脱离实际的愿望; 行不通的计划; 妄想

牛津词典

noun

N-COUNT 白日梦；不切实际的空想
Apipe dreamis a hope or plan that you have which you know will never really happen.
1. You could waste your whole life on a pipe-dream.
  白日梦会荒废你一生。

noun

a fantastic but vain hope (from fantasies induced by the opium pipe)
1. I have this pipe dream about being emperor of the universe
Synonym:dream

You can study acting as long as you like, but starring in a Hollywood movie is just a pipe dream.
只要你喜欢你就可以去学表演，但是主演一部好莱坞电影只是白日梦。
Alternative fuel for vehicles, once a pipe dream, has become a reality.
汽车代用燃料，曾经是一个可望不可及的梦，可现在却日行日近。
For me, it is just a pipe dream to travel to The Moon.
对我而言，去月球旅行只是白日梦。
The idea that they could be freed from the clutches of national governments was a pipe dream.
有人认为它们能摆脱民族国家政府的控制，这种想法就是白日做梦。
Saying that you want something different without thinking and acting differently ensures that you continue to have your pipe dream.
你总是在念叨想要不同的生活，却不想也不做不同的事，这会保证你永远做的是白日梦。
As national reform efforts stall, international harmonisation remains a pipe dream.
随着每个国家的改革努力陷入停滞，国际协同仍然是一个白日梦。
That's just a pipe dream, anyway.
无论如何这只是一个白日梦。
It's a nice little pipe dream.
这是个美好的小幻想。
This is a pipe dream that can cost you both time and money.
这是一个梦想，你既可以成本时间和金钱。
Eg. it feels really cool, but the idea of actually reading it is kind of a pipe dream.
它给人的感觉非常的酷，能够读懂布莱叶盲文是一个让人尖叫的梦想。