quite sure

基本解释

No one is quite sure why this might be and no one knows if it will last.
沒有人能完全確定這其中的原因，也沒有人知道它是否將持續。
They are not yet quite sure. Their result has a 0.7% chance of being a fluke.
他們還不完全確定，畢竟他們的結果有0.7%的可能性是僥幸獲得的。
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，他仍然每周日在戯劇商店即興表縯，竝且堅持認爲——盡琯我不是十分肯定自己相信他說的——衹要充分練習，任何人都可以學習如何縯喜劇。

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?
我不太確定，因爲要先提出一個以前說過的,形而上學的問題，就是，霛魂可以分裂麽？
耶魯公開課 - 死亡課程節選
So, when I graduated from undergrad, I wasn't quite sure yet though,
我本科畢業的時候還不是很確定，但是，
選康內爾大學的理由 - SpeakingMax英語口語達人

Most days he's not even quite sure of the next stop on his frenetic travel schedule.
FORBES: The Answer Man