Are you sure about that?

这事你肯定吗？

《牛津词典》

I'm not sure, honest.

我不能肯定，不骗你。

《柯林斯英汉双解大词典》

He sure looked unhappy.

他的确显得不高兴。

《牛津词典》

You know,the circulation, and the smell of your own panic, you know, when you're not sure what to do."

VOA: special.2010.07.26

- So that brings us back to -- it's a feature that will be disabled by tonight, I'm sure.

所以那个带我们回到-,这个特征在今天晚上会被关闭，我确定。

哈佛公开课 - 计算机科学课程节选

Sure. So I spent some time over in England, so I know a little bit about how they practice law,

当然。我在英国呆了一阵子，所以我对英国的法律有一些了解，

美国式对比英国式 - SpeakingMax英语口语达人

He also said the next U.S. president should make sure that U.S. troops remain in Iraq.

CNN: Cheney: Five years in Iraq a 'successful endeavor'

Sure... but it's also possible that the ninth circle of Hades will be converted into an NHL arena.

ENGADGET

One thing's for sure though... they won't be pretty by conventional CE standards.

ENGADGET: Motorola's rugged ML910 laptop and MW810 mobile workstation