I'm pretty sure I'll be going.

我相当肯定会去的。

《牛津词典》

I'm pretty sure (that) he'll agree.

他会同意的，对此我有相当的把握。

《牛津词典》

I'm pretty sure they slept together before they were married.

我很确定他们结婚前就睡在一起。

《柯林斯英汉双解大词典》

You guys have also seen vectors, I'm pretty sure, but it is worth going over some properties and some may be new and some may be old.

我很肯定你们曾接触过矢量,但复习一下相关的性质是很有必要的,有些可能是新知识,有些是已经学过的

耶鲁公开课 - 基础物理课程节选

I'm pretty sure he's won a Nobel Prize.

我记起来了，他确实得了诺贝尔奖。

知道约翰·纳什吗？ - SpeakingMax英语口语达人

Now I think you may be rather happy to hear that this is the last time --I'm pretty sure that this is the last time - that we will have to discuss, at least at any length, Milton's worries about his unreadiness and his un-preparation.

你们可能会很高兴知道,这是我们最后一次-我对此非常确信,最后一次需要仔细的讨论，弥尔顿对他自身的犹疑和毫无准备的焦虑感。

耶鲁公开课 - 弥尔顿课程节选

Surprised they didn't see it, but I'm pretty sure there was no intention to offend anyone.

CNN: Apparently This Matters: Teatime for Hitler

However, I'm pretty sure they're not as weird as we like to say they are.

ENGADGET: This is the Modem World: Japan is not weird

I'm pretty sure none of this would have happened if I hadn't been fired from Apple.

WSJ: Steve Jobs: 'Find What You Love'