I regard this as a serious matter.

我认为这是一件重要的事情。

《柯林斯英汉双解大词典》

Certes this is a serious matter.

这实在是一件严重的事情。

youdao

Sometimes a young child may get over-excited and be a little too rough, but it's never a serious matter.

有时一个小孩子可能会过于兴奋和有点过于粗暴，但这从来都不是一个严重的问题。

youdao

But no matter where the conflict is or what it's about, if you're serious about peace, you can't take as final the first 'no,' the second 'no' or even the hundredth 'no.'" In her statement, Secretary Clinton promised an "unwavering" U.S.commitment to a two-state solution, based on 1967 lines with agreed land swaps, that will create an independent and viable Palestinian state and an Israel with secure and recognized borders.

VOA: standard.2009.11.25

For that matter, no serious harm done if we ask: Is there life after death?

就此而言,我们再问一个问题也没关系,死后能否继续活着

耶鲁公开课 - 死亡课程节选

"Don't ask, don't tell" -- repealing "don't ask, don't tell" is a serious matter.

WHITEHOUSE: Press Briefing by Press Secretary Jay Carney,

This is a good question and a very serious matter for people of any faith.

FORBES: Godly Work

"The collapse of PPI was a very serious matter for the City of London, " she said.

BBC: How Asil Nadir stole Polly Peck's millions