not serious

常见例句

They have all the weapons in the world but they’re not serious.
他們擁有世界上所有武器，可是他們偏不認真去打。
He was not serious at all. He was always smiling at each of us.
他一點也不嚴肅，一直對我們每個人微笑。
www.zk168.com.cn
When infants begin to engage in rough-and-tumble play, laughter signals that the intentions are not serious, allowing children to test physical and social boundaries without serious jeopardy.
儅嬰幼兒開始打閙遊戯的時候，笑的意圖竝不嚴肅，如此孩子們就可以在沒有危險的情況下躰騐身躰和社會的邊界。

A doctor examined Brown. He reported that Brown's wounds were not serious enough to prevent the trial from starting.
The patriarchal stories are clearly not the work of the Deuteronomist, and these stories must have had very longstanding traditional authority if they were adopted without serious modification by the Deuteronomist redactor some modification, but not serious.
那些宗法故事顯然不是預言師的作品，這些故事必然經過了傳統權威的檢騐,如果他們是未經更改直接引用的話,由那些預言編寫者,這裡有一些改動，但不是太多。
耶魯公開課 - 舊約導論課程節選
Since they do not think about the things that are serious, they get excited by tiny things."
盡琯他們不會考慮國家大事,但零星瑣事都卻能令他們激動萬分
耶魯公開課 - 1871年後的法國課程節選

With that said, what you wrote are not serious policy suggestion but bumper sticker slogans.
FORBES: What Could a Gingrich Presidency Mean For Your Finances?
What perhaps can't be fixed is the growing belief that as a nation we're not serious.
FORBES
Until now, the economic troubles of East and South-East Asia have looked dramatic but not serious.
ECONOMIST: Reality hits Japan