Don't laugh, it's a serious suggestion.

别笑，这是一条严肃的建议。

《牛津词典》

If read as a critique of the way the U.S. auto industry works now, rather than a serious suggestion, the idea has some merit.

如果把这个建议当成是美国汽车业工人的一句评语，而不严肃地讨论的话，这个建议还是有一定可取性的。

youdao

It's a serious suggestion in that I believe it is the most promising and practical option in terms of current technology to solve the biggest parts of the problem.

这是一个严肃的建议，因为我相信在目前的技术条件下，它能解决气候变暖的大部分问题，因而最有前途的和最可行的选择。

youdao

It was hard to believe this was being presented as a serious suggestion.

FORBES: NRA Press Conference: Blame Video Games and Movies, Not Guns

If President Bush is serious about rekindling NASA--a worthy idea--I have a suggestion.

FORBES: Magazine Article

Apart from anything else, Bloomberg and the Wall Street Journal both highlighted the big credit-derivative positions being taken by JPMorgan in London a few weeks ago, and the bank rejected the suggestion that there were serious dangers here.

BBC: JPMorgan��s loss may cost all banks