那时我不知道他是个大明星，但我清楚地记得那次旅程。

At the time I didn't realize what a superstar he was, but I do remember the ride well.

youdao

我知道很多优秀的人才正在试图改变现状，但我还没有看到有人站出来，能够清楚地知道一所大学的学术课程需要什么，以便我们聘请他们。

I know many good people are trying, but I've yet to see anyone come out of a university program knowing what they'd need to know in order for us to hire them.

youdao

我不清楚谁说的是事实，但我知道如果这个国家能够找到问题的根本的话，那是很有益的。

I have no idea who is telling the truth, but I know it's very good for the country to get to the bottom of it.

youdao

I don't know how you want to try to keep those straight but anyway.

我不知道你们要怎样把事情记清楚,但，不管怎样。

麻省理工公开课 - 固态化学导论课程节选

Well, I don't really know for Columbia in general, but I know for the law school,

我不太清楚哥伦比亚的整体情况，但我知道法学院的标准。

法学院的入学过程 - SpeakingMax英语口语达人