他创作了乐曲，但我不知道谁填写的歌词。

He wrote the music but I don't know who wrote the words.

《牛津词典》

我再也不想和她做朋友了，但我不知道如何告诉她。

I no longer want to be friends with her but I don't know how to get the message across.

《柯林斯英汉双解大词典》

“那感觉多好啊，但我不知道如何写诗。”她说。

"How good it would feel, but I don't know how to write poems," she said.

youdao

And I don't know why, but since time immemorial that is the way computer scientists have drawn trees.

叶子是在最下面的，我不知道为什么,但从记事以来他们就是这么画树的,这也许就是为什么我们。

麻省理工公开课 - 计算机科学及编程导论课程节选

But for me, I like to look at something and just say, "I like this. I don't really know why though."

但对我来说，我喜欢看着某个东西，然后说，“我喜欢这个。但我也不知道为什么。”

关于现代美术 - SpeakingMax英语口语达人

up here if you want beer flavor this might be Guinness, which I can't even spell, but you know what I mean.

在这边的啤酒口味是,吉尼斯,我甚至不知道怎么拼,但你们知道我说的是什么

耶鲁公开课 - 博弈论课程节选