'And if I say no?' she ventured.

“那么我要是说不呢？”她试探说。

《牛津词典》

Sometimes it is necessary to say no.

有时候说“不”是必要的。

《柯林斯英汉双解大词典》

He may say no, but there's no harm in asking.

他可能拒绝，但问一问也无妨。

《牛津词典》

I edit every word that I say, I say no words that have not gone through my hand, many of them my own."

VOA: special.2009.08.16

That's why we need independence of the central bank; we want to have a central banker that can say no to the government.

这就是为什么我们需要独立自主的,中央银行；,我们希望有一个可以对政府说不得,中央银行家。

耶鲁公开课 - 金融市场课程节选

So it's easy to see why we might be tempted to say no mere machine could think or reason or have beliefs or desires.

所以很容易明白,为什么机器无法做到,我们刚才讨论的那些特质

耶鲁公开课 - 死亡课程节选

"My biggest weakness in life is that I can't say no, " says Branson, 49.

FORBES: Red Baron

In a free economy, most of us just say no to the expensive dessert.

FORBES: The Road Not Taken: Free Market Health Care

Officials say no evidence has surfaced that he met Mr. Tsarnaev in Dagestan last year.

WSJ: Dagestan Islamists Were Uneasy About Boston Bombing Suspect