我想这个问题想了很久，但还是想不出答案。

I have been pondering over this problem for quite a long time but still couldn't puzzle it out.

youdao

M：我想也是，我失业很久了，现在很需要这份工作。

M: I guess so. I am badly off and I need this job.

youdao

我想是的，到现在有六年了，你住在美国很久了吗？

I've lived here for about six years now. Have you lived in America very long?

youdao

All I've done is write down slightly boringly and nerdily, exactly what we already saw in a couple of occasions.

我写在黑板上的都是那些乏味的定义,我想你们你们忍受很久了

耶鲁公开课 - 博弈论课程节选

In, over my life? Oh my gosh! I hope a long time, but I think my knees are probably going to give up.

我的一生吗？天啊，我希望我能跑很久很久，但我想我的膝盖可能受不了。

在马拉松认识的朋友 - SpeakingMax英语口语达人

And this will have to go up before The International Union of Pure and Applied Chemistry before they approve it because they fought over element 106 for the longest time, but I think this will go through fairly quickly.

但还是要往上申请,直到国际纯粹与应用化学联合会,因为同意,他们为106号元素抗争了很久，但我想这个应该会很快通过。

麻省理工公开课 - 固态化学导论课程节选