我可以确信地说他们当中没有人过去或现在是种族主义者。

I can confidently say that none of them were or are racist.

《柯林斯英汉双解大词典》

这些屏幕的一个特征就是没有色彩，虽然彩色的版本将会面市，但是没有人能确信彩色的能成功。

The one feature these screens do not yet offer is colour and, though colour versions will surely come to market, no one is yet sure which version will succeed.

youdao

当我凝视他们的时候，没有人转开视线，或者逃避目光，因此我确信，我可以继续下去。

None of them looked away or averted their gaze from mine, which I took as confirmation that I could continue.

youdao

So, none of you in this room, I'm 100% confident, never ever got a smallpox vaccine.

所以我百分百确信这间教室里所有人,没有一个人接种过天花疫苗

耶鲁公开课 - 生物医学工程探索课程节选