这确实是个异想天开的想法。

It is a really fantastic idea.

youdao

这是未来的摩天大楼，还是一个异想天开的想法？

Is it the skyscraper of the future, or just a pie-in-the-sky idea?

youdao

你的想法异想天开，不切实际。

Your idea is whimsical and unrealistic.

youdao

或者我的想法也是异想天开。

Perhaps mine has been a flight of fancy too.

youdao

一百多年前机器能飞上天的想法似乎有些异想天开。

The idea that machines could fly seemed fantastic a hundred years ago.

youdao

一百多年前机器能飞上天的想法似乎有些异想天开。

The idea that machines could fly seemed fantastic a hundred years ago.

youdao