By the way, I've never known whether it is a fact.

其实我也从来都不知道这句话这是不是真的。

耶鲁公开课 - 文学理论导论课程节选

I don't know. There's not many places I don't like, actually.

不知道。其实没几个我不喜欢的地方。

来自瑞典 - SpeakingMax英语口语达人

Now,I don't actually know whether it's true that simple things can't split.

我其实不知道是否简单的东西就不能分裂。

耶鲁公开课 - 死亡课程节选

Because of this policy, I don't actually know when all is said and done whether at the end of the semester I'm any harder, whether I depart from the average or not.

因为这个政策，我其实不知道当所有的说完,和做完是否在学期结束我评分更严格，是否我偏离了平均水平。

耶鲁公开课 - 死亡课程节选