一个空想主义(经常是不切实际的)的社会改革者。

An impractical, idealistic scheme for social and political reform.

youdao

这是一个阻碍两边对话的不切实际的空想。

It is a myth that thwarts negotiation of the two sides.

youdao

她必须从一块钱或一分钱的观点，锱铢计较地看待每一件事物，否则她只是不切实际的空想家。

She must look at everything from its dollar-and-cent point of view, or she is a mere romancer.

youdao

But then developments in other fields can change the relative prices and suddenly make an idea that had been hypothetical and unapplied suddenly work well.

而其他领域的发展,改变了相对价格,过去那些看似空想,而且不切实际的主意,就突然间变得可行了

耶鲁公开课 - 金融市场课程节选