痴人说梦的英文：
[Literal Meaning]
idiotic/person/speak/dream
An idiot talks about his dream

[解释]
凭借荒唐的想象胡说。

[Explanation]
idiotic nonsense; lunatic ravings

[例子]
现在就想完成全年的销售目标，简直就是痴人说梦。

[Example]
Wishing to finish the sales of the whole year now is absolutely idiotic nonsense.