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

我真觉得自己有些异想天开，可我真的有这个想法：我们人类发明一种能听懂任何动物的语言的耳机。

I really feel some whimsical, but I really have this idea: we can understand the invention of a language of any animal headphones.

youdao