我不确定我将来能不能发财，但我获得了工作满足感。

I doubt I'll ever get rich, but I get job satisfaction.

《柯林斯英汉双解大词典》

我没有身份证件，所以警察无法确定我就是那辆车的主人。

I had no ID on me so the police couldn't establish that I was the owner of the car.

《柯林斯英汉双解大词典》

我不确定我是否把地址抄对了。

I'm not sure if I copied the address correctly.

youdao

I'm not at all sure there's anything more to be said about that passage, which I think lays it to rest.

我不确定这篇文章是不是,还要更多的讲解，就这样的吧。

耶鲁公开课 - 文学理论导论课程节选

And then our drop date is normally, I'm not exactly sure when, but it's actually probably in November,

然后退课的日子通常是，我不确定什么时候，不过其实大概是十一月，

对于返校日 - SpeakingMax英语口语达人

Now I don't know, I may be different than other people, but I think organic chemistry is really interesting.

但我不确定,也许我和他人不太一样呢,我认为有机化学很有趣

耶鲁公开课 - 金融市场课程节选