Are you quite sure ?

你有十足把握吗？

《牛津词典》

Good! Are you quite sure?

很好！你非常确定吗？

youdao

Are you quite sure of it?

你十分肯定吗？

youdao

So, I'm not quite sure what the takeaway there is but realize you are perfectly welcome to shop and then still take the course.

虽然我也不清楚有什么外卖,但是你必须意识到商家是很欢迎您光临他的店铺的,而且希望你以后也一直光顾。

哈佛公开课 - 计算机科学课程节选

either you don't quite know something or you are honestly not sure of something

你对某事不知情或是你对某事不确定

I wonder if 课堂 - SpeakingMax英语口语达人

Make sure you qualify since the stakes are quite high.

FORBES: IRS Gives Big Break To Some Offshore Account Holders

Like I try to prepare myself because I - you know, when kids are really little and they fall down and they're not quite sure if they're hurt, so they look at you.

NPR: Ask Amy: Responding to the Thin Envelope