I'm not sure—I can find out for definite if you like.

我没把握—如果你愿意我可以去核实。

《牛津词典》

After another reflective silence, Tom said, "Hucky, you sure you can keep mum?"

汤姆又沉思了一会，然后说：“哈奇，你肯定不说出去吗？”

youdao

I'm sure I can rustle you up a sandwich.

我保证能马上给你弄份三明治。

《牛津词典》

"How do you make sure you are designing a system where you are going to constrain risk taking, you can prevent crises from spreading,and -- if a major institution managed itself to the edge of the abyss -- that we are able to put them out of their misery."

VOA: special.2010.04.16

Because,you know,you can't trust me,and so you have to check me out and make sure I'm not lying to you.

因为你不能相信我,你要弄清楚我是否对你们撒谎了。

耶鲁公开课 - 新约课程节选

And they want to be sure that before you get married, you can do things in the house.

他们想在结婚之前确认，你能做家务。

I'm good at 课堂 - SpeakingMax英语口语达人

Tell your story first, so that you can be sure you have one.

FORBES: PowerPoint's Dirty Little Secret

That is what practice games are for, so that when the real stuff comes you can make sure you're absolutely on your game.

BBC: Ireland and Aussies win warm-ups

That's money you can be sure you'll lose.

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