Are you sure about that?

这事你肯定吗？

《牛津词典》

I'm not sure about it .

我对这不确定。

youdao

youdao

The spokeswoman says if you get an e-mail you are not sure about, forward it or send a separate message to ContactETS@ets.org.

VOA: special.2010.02.18

But then we went a little further, we considered those other cases and people weren't so sure about consequentialist moral reasoning.

但随着谈论的深入，我们发现在其他情况中,人们不再对后果主义道德推理那么确定了。

耶鲁公开课 - 公正课程节选

I'm not sure about the other schools, but I know FIT, we get in free.

我不确定其他学校的情况，但是我知道FIT的学生可以免费进去。

学生们的艺术热情 - SpeakingMax英语口语达人

But Wall Street isn't so sure about future sales growth, at least in the short term.

FORBES: Harley-Davidson Dazzles Wall Street

There is a lot she will not be sure about at the subsequent inquiry.

CNN: Books - Excerpt: 'Flint'

This is a huge factor, and one that we can be quite sure about.

FORBES: Petroleum Balance