It's such a pity if you start off on a bright tone on a story and suddenly realize you are talking about some people having been killed in a road crash.

如果你以欢快的嗓音开始播报新闻，但却突然意识到那是一篇致人死亡的交通事故的报道时，那就太遗憾了。

youdao

Because it's such a pity if you start off on a bright tone on a story and suddenly realize you are talking about some people having been killed in a road crash.

因为如果你一开始用欢快的语调讲一个故事，然后突然意识到你讲的是一些在车祸中丧生的人，这是很遗憾的。

youdao

The miseries I went through made me suddenly realize with a blinding flash what life was all about.

我所经受的苦难令我豁然顿悟生命的意义。

《柯林斯英汉双解大词典》

If Hartman was surprised, imagine the reaction of less tax-savvy people who suddenly realize that their heirs face a worry usually thought to be reserved for Rockefellers.

CNN: Death And Lower Taxes

Are we going to go to other countries and suddenly realize that China and South Korea and all of Europe all have better infrastructure than we do, and we think that businesses are going to come here and invest?

WHITEHOUSE: Town Hall on America��s Fiscal Future

Suddenly they realize that, Oh my God, I got problems with my children.

CNN: Interview with Jack Neo