It mean something unrealistic, not practical
When first invented, the car and phone were pie-in-the-sky ideas. Now we have phones in cars.
Note:
pie in the sky的意思是不切实际的东西。
汽车和电话在被发明出来以前都是天方夜谭，但是现在我们在汽车中打电话
It mean something unrealistic, not practical
When first invented, the car and phone were pie-in-the-sky ideas. Now we have phones in cars.
Note:
pie in the sky的意思是不切实际的东西。
汽车和电话在被发明出来以前都是天方夜谭，但是现在我们在汽车中打电话
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