Can you come at 10:30? I know it's inconvenient, but I have to see you.

你能10:30来吗？我知道这不方便，但是我必须要见你。

《柯林斯英汉双解大词典》

I don't know. Correction—I do know, but I'm not going to tell you.

我不知道。不，我知道不假，但不打算告诉你。

《牛津词典》

I want him back, but I just don't know how to go about it.

我希望他回来，可我就是不知道怎么去做这件事。

《柯林斯英汉双解大词典》

"Vice President Lyndon Johnson has left the hospital in Dallas, but we do not know to where he has proceeded.

VOA: special.2009.08.16

Now, we are very gentle in this course with respect to knowing integrals, but this is one you have to know.

这门课对积分,的要求并不高，但这个积分你们必须会算。

麻省理工公开课 - 热力学与动力学课程节选

I don't know if there's anything in particular that you would like to know about it, but...

我不知道你有没有特别想了解的方面，但是……

在布莱恩公园 - SpeakingMax英语口语达人

But to know today what gospel music has done for my life and just for the world, in general, I never could have imagined it.

NPR: Gospel Singer Yolanda Adams, 'Day by Day'

They are given the opportunity to change their fate, but they have to know not just how to pick a candidate, but also know how to integrate them into their team.

FORBES: Learning Collaboration from the NFL's Anti-Fragility

It's easy to find isolated cases, but hard to know how often a problem is occurring.

FORBES: Face Of The Year: David Graham