Many country towns were still living in blissful ignorance of the post-war crime wave.

很多乡间小镇对战后的犯罪潮一无所知，依然生活在无忧无虑中。

《柯林斯英汉双解大词典》

The upside of painful knowledge is so much greater than the downside of blissful ignorance.

痛而知道的益处，远大于乐而无知的害处。

youdao

In the end, we would like our business logic to live in blissful ignorance of the scary magic in the EIS.

最后，我们希望业务逻辑在EIS中能发挥神奇的作用，而无需知道它的原理。

youdao

"This blissful ignorance about how things got done behind the scenes is over, " he says.

WSJ: Welcome (Back) to Russia

They had a stock answer for every problem fire the manager, cut costs, find new customers in blissful ignorance of local conditions.

ECONOMIST: A disorderly heaven