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

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

CNN: Interview with Jack Neo

That all changed, though, in the run up to its IPO when it suddenly seemed to realize that mobile was the future.

FORBES: Facebook's Next Big Step: Its Own Phone