That one mistake seriously endangered the future of the company.
那一个失误就严重地危及了公司的未来。
The government has been criticized for not taking the problem seriously.
政府因没有认真对待这个问题而受到指责。
Seriously though, it could be really dangerous.
不过说实在的，这事说不好真的很危险。
It made a refreshing change to be taken seriously for once.
总算有一次受到认真对待，这变化真是令人耳目一新。
Why can't you ever take anything seriously?
你怎么对什么都不当回事呢？