This is a serious matter.
Escaping a fire is a serious matter.
This is a very serious matter.
I regard this as a serious matter.
Police brutality is a serious matter.
"Danfo" is a very serious matter.
Stop giggling, children; this is a serious matter.
Do not treat this serious matter as a joke.
Betraying your spouse's trust is a serious matter.
清晨的公园里已经是人们欢乐的海洋，很多爷爷、奶奶已经在锻炼身体了。
no big deal(not important, no problem, not a serious matter)
Used at the beginning of a sentence when turning to a serious matter
Be careful what you say, old boy, for this is a serious matter.
In other days Pork's pilfering would have been a serious matter, probably calling for a whipping.
Regional inequalities, then, are a serious matter, and Beijing's leadership is at last beginning to wake up to them.
That most of languages are now threatened and may disappear is a serious matter to the people.
We once thought that leaving home and going to live in another city, without local accounts, is a very serious matter.
In many countries, where people go to college and what degrees they hold is a serious matter affecting job prospects and social standing.
In this its own can not explain and determine the state of mind, I can not do a good job in a serious matter since the beginning of their own.
So far,my husband has not been in this serious matter with irrefutable facts and the responsibility completely resting on the ,you are too cowardly to voice an “ apology” and have been trying to shirk your responsibility repeatedly and defame my husband groundlessly.
Never jest about serious matters.
Never joke about serious matters.
Tax fraud and evasion are serious matters.
