quite sure

基本解释

No one is quite sure why this might be and no one knows if it will last.
没有人能完全确定这其中的原因，也没有人知道它是否将持续。
They are not yet quite sure. Their result has a 0.7% chance of being a fluke.
他们还不完全确定，毕竟他们的结果有0.7%的可能性是侥幸获得的。
To this day he still performs improv every Sunday at the Comedy Store, and insists – though I'm not quite sure I believe him – that anyone could learn how to do it if they practised enough.
直至今日，他仍然每周日在戏剧商店即兴表演，并且坚持认为——尽管我不是十分肯定自己相信他说的——只要充分练习，任何人都可以学习如何演喜剧。

but nobody is quite sure why.
I'm not quite sure,because we have to turn to a metaphysical question that we've touched upon before,namely,can souls split?
我不太确定，因为要先提出一个以前说过的,形而上学的问题，就是，灵魂可以分裂么？
耶鲁公开课 - 死亡课程节选
So, when I graduated from undergrad, I wasn't quite sure yet though,
我本科毕业的时候还不是很确定，但是，
选康内尔大学的理由 - 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