I think you should take the lab sometime, but I don't know how many semesters that you have to take.

我觉得你们应该是不是地去做几次实验,我不太清楚你们要上多少个学期的课

耶鲁公开课 - 基础物理课程节选

But I don't really know about how long it would take people to hack, like, the general firewall

但我不知道人们具体要用多长时间才能穿过防火墙，

理想是当密码专家 - SpeakingMax英语口语达人

I don't know how to evaluate everything Icahn has done but some corporate raiders have been unkind to employees.

我不清楚如何评估伊坎,做过的所有的事情，但是一些公司蓄意收购者,一直以来对雇员都不友善。

耶鲁公开课 - 金融市场课程节选

The smog went but I don't know how much one could ascribe it to the actions taken.

BBC: The filthy air conundrum

"It is a big frustration and disappointment but I don't know how big a blow it is to our title chances, " he stated.

BBC: Arsene Wenger blames Man Utd pitch for Arsenal mistakes

"I don't want to feel like a spoilsport, but I don't know how you can set them off safely given the potential they have to cause fires, " she said.

BBC: Chinese sky lantern blamed for Trowbridge house fire