你可以在白日梦上浪费一辈子时间。

You could waste your whole life on a pipe dream.

《柯林斯英汉双解大词典》

据估计，人们在醒着的时候，有近一半的时间都在做白日梦。

By one estimate, people daydream through nearly half of their waking hours.

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张桂梅花了多年时间帮助贫困地区约1800名女学生实现了她们的大学梦。

It took Zhang Guimei many years to help about 1,800 girl students in poor areas realize their college dreams.

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Dreams" is such a fun topic that I'm going to devote half a class to sleeping and dreams.

梦“是个很有意思的话题,我将会用半节课的时间来说说睡眠和梦。

耶鲁公开课 - 心理学导论课程节选