Like if people jump the traffic lights, I don't know why there isn't a camera of the traffic lights to stop people doing that.

例如，我不知道为什么不在交通灯杆上安装监控摄像机来防止人们闯红灯呢？

youdao

Like if people jump the traffic lights, I don't know why there isn't a camera at the traffic lights to stop people from doing that.

比如，为什么不在交通灯杆上安装监控摄像机来防止人们闯红灯呢？

youdao

I don't know how she copes with looking after her family and doing a full-time job.

既要照顾家庭又要全天工作，我不知道她是如何对付的。

《新英汉大辞典》

Because if it's irreversible, it's very likely that I don't know what the pressure inside the system is doing while this is happening.

因为对不可逆过程，系统内部的压强,没有明确的定义,气体不处于平衡态。

麻省理工公开课 - 热力学与动力学课程节选

People, but I don't know, at the same time, I think people are really interested in what they're doing.

那里的人......我不太清楚，不过同时，我觉得那里的人们都抱着浓厚的兴趣在做自己的事。

最喜欢的一门课 - SpeakingMax英语口语达人

My management doesn't ask me what I'm doing in here, all right? They don't know.

我的管理部门没有问我在课堂上做什么，他们根本不知道。

麻省理工公开课 - 固态化学导论课程节选

Because a lot of times, I walk in the doctor, I just do what I'm told -- I don't know what he's doing.

WHITEHOUSE: "White House to Main Street" Town Hall: Elyria, OH

"He said he didn't have one round of sparring, I don't know what he was doing in there, " said Warren.

BBC: Warren's warning to Maccarinelli

And he suggests that people like Carl Rove - he says, I don't know what he was doing during the war, but I was a veteran.

NPR: Debate on Iraq Timetable Moves to Senate