I had no idea how to get beyond casual friendships to anything romantic, no idea at all.

我不知道如何越过普通的友谊进入到浪漫的关系，根本没有任何主意。

youdao

I had no idea the beach was so close.

我不知道海滩原来这么近。

《牛津词典》

I'm so sorry – I had no idea you felt that way.

我很抱歉–我不知道你是那样想的。

《柯林斯英汉双解大词典》

Louise, he's here. Now, when I got home,I had no idea, but Mama had all sortsof visitors.

VOA: standard.other

I was done putting together the site, I had no idea how successful it could be.

当网站建好之后，我也不清楚它会有多成功。

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选

This is the strongest memory I have, and I remembered a) that I didn't learn them, and that was really bad because it kept coming up, but the other thing I remember is that I had no idea why they were important. I didn't really understand what any of these molecules were.

这就是我最深刻的记忆，我记得我并没有学好，这十分不好，因为之后它们总是不断出现,但另外的事情我记得,是我完全没有概念为什么。

麻省理工公开课 - 化学原理课程节选

Frakes: When I first auditioned, I had no idea what a cultural phenomenon Star Trek was.

FORBES: Frakes On Meeting Roddenberry, The Riker Beard, His 'Next Gen' Family And Learning To Direct

But in this case, I had no idea what in the world she was talking about.

FORBES: What type of business person believes in personality tests?

"I had no idea a tornado could flatten whole neighborhoods like this, " he said.

WSJ: After Oklahoma Tornadoes, Rescue Efforts Focus on Survivors