You say you don't know.

我的一脸茫然，你能说什麽？

youdao

Wait, you say you don't know what they did well?

等等，你说你不知道他们哪儿干得棒了？

youdao

If you say you don't know, that means you are shirking.

如果你说不知道，只能说明你在逃避。

youdao

So instead of watching bullying take place or joining in with the bullying, these programs teach bystanders how to stand up and be supportive of the kids who are being victimized and to say 'You know we don't do that here, we don't engage in those behaviors.'" Professor Swearer advises parents and teachers to try to get children to talk to them about being bullied.

VOA: special.2010.05.06

So if you haven't already, just glance at the person next to you, or say hello if you don't know them.

如果你还没有做好，那就看看你旁边的人,如果你不认识他们就跟他们打个招呼。

哈佛公开课 - 计算机科学课程节选

because there's, I don't know what to say, over 50, 60 colleges, you know, that are recognizable in California

因为在加州有，我不知道怎么说，有五六十多所众所周知的大学，

加州的大学 - SpeakingMax英语口语达人

You say you don't know why we are fighting -- what we are trying to accomplish -- and even whether we are "at war" at all.

CNN: What Obama should say about Libya

You know, they say I don't know, you know, whether the other company will ever be able to pay me back.

NPR: Fed OKs Changes At Goldman, Morgan Stanley

Don't say what you don't know for sure until it's finally decided.

CNN: Five things we learned from the Benghazi hearings