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 really don't know, but I still want to know.

我真的不知道，但我还是想知道。

youdao

I know he likes wine, but I don't know what type.

我知道他喜欢葡萄酒，但我不知道是哪种。

youdao

But we certainly didn't have goals. I don't know if we had ever heard of Grammys at that point.

VOA: special.2010.04.19

Didn't I know anything about turn about to right, but now I think I know enough to amuse them and to entertain them.

我从前从不知道这些东西，但现在我已经学的足够多,足够引起他们的兴趣了。

麻省理工公开课 - 媒体、教育、市场课程节选

You know, so I going there from where I live at is like downhill. You know. But it's beautiful, you know.

所以，从我住的地方到那里实际上就是下山。不过那里很漂亮。

河滨公园 - SpeakingMax英语口语达人

Sure, I know more than I did then, but I also know that I am fallible.

FORBES: Is Your Doctor Relying On Bad Information?

Mr. COLEMAN: Well, I don't know if I'm hitting it, but I know I'm not missing it.

NPR: Ornette Coleman on Sound Innovations

But I know that they don't -- but I know they don't want to just offer nothing to the millions of people in America who are in the situation that that woman was in.

WHITEHOUSE: The White House