She seems very sure of herself.

她好像十分自信。

《牛津词典》

I hope you are sure of your facts.

我希望你能肯定你说的都是事实。

《牛津词典》

You're always sure of a warm welcome there.

到了那里你肯定会受到热烈欢迎。

《牛津词典》

They felt sure of success. For now,enough leaders of the Southern Alliance were willing to support the idea.

VOA: special.2010.06.10

Cervantes is preoccupied with a figure who is crazy we're pretty sure of that, but he certainly isn't.

塞万提斯专注于一个疯了的人物,这一点我们很确定，但是他并不这么认为。

耶鲁公开课 - 文学理论导论课程节选

Because it poses, it just throws out the fact that you're not sure of something

因为这个句型造成，它明显地表明了你对于某事并不确定，

I wonder if 课堂 - SpeakingMax英语口语达人

Most days he's not even quite sure of the next stop on his frenetic travel schedule.

FORBES: The Answer Man

The police chief in Dubai has said he is 99% sure of Israeli involvement.

BBC: Venus beats Israeli Peer amid tight security in Dubai

Still, at any given point, Wikipedia visitors can't be sure of what they're getting.

CNN: Use with caution: The perils of Wikipedia