It turned out that life may not be so serious.

原来，人生可以不那么严肃。

youdao

I see what you mean, but his carelessness may not be so serious.

我明白你的意思，不过他的粗心大意可能并不那么严重。

youdao

No detrimental gas was evolved during operation and the environment pollution might not be so serious as in air blowing process.

与氧化沥青过程相比，本过程另一个突出的优点是不排出有害气体，因而可以显著地减少对大气的污染。

youdao

It can be any kind of trouble--serious, and not so serious.

VOA: special.2009.05.10

However, Mr McLaughlin said Mr Paisley "giving an ultimatum to the IRA not to deal conclusively with its weapons" was "an absurd situation which would be laughable if it were not so serious".

BBC: DUP leader Ian Paisley met Paul Murphy and Dermot Ahern

The first, a complete discharge, could not be considered because their acts were so serious.

BBC: Northern Ireland

The cartoonish illogic and bizarre conspiracy theories to which they have been driven by their almost pathological hatred of Putin would be laughable were they not so serious.

FORBES: A Case Study in the Fecklessness and Idiocy of Russian Liberalism