我说不清楚是什么时候气得变化。

I can't say exactly when it changed.

youdao

我说不清楚，亲爱的。

I cannot explain this, Dear.

youdao

我说不清楚是什么深深的苦恼使我的心激动不已。

I cannot tell what a profound distress overpowered my heart.

youdao

In fact, I don't quite know what he is saying" and struggled more than you're expected to because you anticipated what I've just been saying about the setting and about the role of Foucault and all the rest of it, and were possibly more confused than you might have expected to be.

事实上，我也不太清楚他在说什么“,然后你发现这比预想的更难理解,因为你预想了我给你们设置的背景,以及福柯和其他人的角色，然后可能会发现比自己预想的更困惑。

耶鲁公开课 - 文学理论导论课程节选

His friend told me that he doesn't have a girlfriend, but I'm not sure.

他的朋友跟我说他没有女朋友。可我还是不清楚。

I want to 实战 - SpeakingMax英语口语达人

I don't know, I think that-- I think what Jeremy would say is, well you're looking--if you look at Russia and China, you're looking at political factors and I'm only looking at politically stable countries, so this whole thing is irrelevant.

我不清楚,我认为...,我想杰里米会说,观察下俄罗斯和中国两个国家,考虑到其中的政治因素,我只研究政治环境稳定的国家,他们显然要被排除在外

耶鲁公开课 - 金融市场课程节选