"Celebrating with our family." "Presents!" "I usually get presents that say Santa Claus on them but I'm not really sure if they're from him."

VOA: special.2009.12.21

I'm not really sure who said it but it's in a Lynda Barry novel called "Cruddy".

我并不确定是谁说的,不过确信这是在林达·巴里的小说《压花》里的话。

斯坦福公开课 - Twitter之父Jack.Dorsey演讲：好奇和灵感的力量课程节选

But I'm not sure that you can really make that assumption based on something that someone creates

但我不确定你真的能基于某人创作的某些作品来做那样的推断，

印象深刻的展示会 - SpeakingMax英语口语达人

I'm not sure whether this really should be called a coma.

我不确定这是否真的该被称作昏迷。

耶鲁公开课 - 死亡课程节选

I like to have something that's my own, and continue writing too. I really, I'm not sure.

我想有点自己的东西，还想继续写作。我真的不确定。

为我的生活 - SpeakingMax英语口语达人

I'm not really sure that that's the case.

我不太确定情况就是这样的。

耶鲁公开课 - 公正课程节选

I'm not really sure. I guess it's definitely very different from mine

我不知道。但我觉得她的生活和我非常不同，

介绍好朋友 - SpeakingMax英语口语达人

I'm just not sure that they really need all of that.

我只是不确定他们是否真的需要那样做。

纽约的交通手段 - SpeakingMax英语口语达人

In the future, I'm not really sure yet,

在将来，我不敢肯定，

再没时间也要挤出来 - SpeakingMax英语口语达人

I'm not really sure why that is.

我不知道为什么。

经济危机也能避开 - SpeakingMax英语口语达人

and then I realized I'm not really sure what I want to go for,

然后我意识到自己不确定学什么，

为我的生活 - SpeakingMax英语口语达人