I don 't believe it, no, not I.

我不相信这事，不，我绝不相信。

youdao

I still can 't believe it.

我还是不太相信。

youdao

I can "t believe it!"

我真是不能理解！

youdao

"Now, I don't believe it's too late to change course.

VOA: special.2009.01.09

They don't speak to their kids because they don't believe it's important to speak to their kids.

他们之所以不和孩子们说话,是因为他们觉得和孩子们说话并不重要

耶鲁公开课 - 心理学导论课程节选

You wouldn't believe it reading the Popular Press but it's really true, it's really true.

读了大众报纸上讲的,你们可能不相信我所说，但那是事实。

斯坦福公开课 - 微软CEO-Steve.Ballmer谈科技的未来课程节选

As Yugoslav news reports play up reports of civilian deaths, however, many Serbs don't believe it.

CNN: NATO says bridge was legitimate target

"She doesn't buy that, doesn't believe it, and absolutely stands by her man, " Carney said.

CNN: Girlfriend gets 8 years for hiding 'Whitey' Bulger

"We didn't believe it would work, " says Mr. Longwa, the maize farmer in Mikumi.

WSJ: Elephants Now Think Twice About Midnight Snacks in Tanzania