I think for a long time.

我想了很长时间。

youdao

He used to think for a long time reading the old letters. His friends are all gone, and he is alone now. What a pity!

他犹豫了很久要不要读那封旧信。他的朋友们一个个儿的都走了，只剩下他孤身一人。真可怜啊！

youdao

But think for a long time. I was unexpectedly not idol in my heart. Why? I ask me. Suddenly, I knew that my future is my idol.

但是想了很长时间，我竟然觉得心中没有偶像。为什么？我问自己。突然，我意识到未来的我就是我的偶像。

youdao

The results suggested that people do act differently if they think they are working with a group for a short period of time instead of a long period.

VOA: special.2009.03.03

So what I'm saying now is it took a long time for this to solidify. And one of the things we think made it solidify was the development of codices,a codex.

所以这花了很长一段时间,才得以统一，我们觉得,使它统一的是抄本的出现。

耶鲁公开课 - 新约课程节选

unless it has really good quality or I think it's going to last me for a really long time.

除非它真的质量很好，或者我认为我真的会用很久。

SOHO的画廊 - SpeakingMax英语口语达人

If it's a situation where you think it's going to continue for a long period of time, you want to potentially think about selling the property, as hard as that decision might be.

NPR: Protect Yourself Against Lending Fraud

That's actually an idea that business groups and Republicans I think have supported for a very long time.

WHITEHOUSE: Presidential Press Conference

And I think it'll last for a long time yet.

NPR: JFK, 'An Unfinished Life'