Are you sure it is accurate?

你对它的正确性是否有把握？

youdao

Are you sure it was your husband?

你确定他是你的丈夫吗？

youdao

Are you sure it was sent to whole office?

你肯定所有的办公室都发了吗？

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

OK, important -- if you are part of this group here think about it and make sure you understand that.

好的，这很重要，如果刚才你选了可逆过程,请好好想想并且保证已经理解了这个问题。

麻省理工公开课 - 热力学与动力学课程节选

which are... I'm sure you'll go, it's on the Prospects Street.

就是……我相信你会去的，在前程街。

高尔夫俱乐部的回忆 - SpeakingMax英语口语达人

Are you sure that it is a good idea to confound commercial banking, investment banking, insurance and stock brokerage?

ECONOMIST: Letters

The big concern is that you are opening yourself up to a tremendous amount of risk and you want to make sure that you are comfortable with it.

FORBES: Options Straddles Can Score You Touchdowns Or Get You Sacked

You should use "free" software only if you are sure it is from a reputable company, and that the company which built it provides it directly.

BBC: Viewpoint: Small firms prove to be weak link to hackers