I think I have said enough.

我想我已经说得够多了。

《柯林斯英汉双解大词典》

I think I have enough to go on already.

我想我已经有足够的东西可以继续了。

youdao

I think I have it and I know I have it.

我觉得我有这个东西，而且我知道我有。

youdao

He said,"I think I have written a lot and sent it off to be printed before I realized strangers might read it."

VOA: special.2010.01.10

I think I have sort of two things to go together that are very simple, that doesn't matter where you live.

我有两点要讲,他们都很简单,无论你住在哪里都可以。

普林斯顿公开课 - 人性课程节选

and so I think I have a really personal story about that of why I think it's really important.

所以我对这方面有着真实的感受，能够解释移民政策的重要性。

美国的移民政策 - SpeakingMax英语口语达人

"I still think I have got a couple of years left in me, " he added.

BBC: Hamann keen on top-flight return

Nor do I think I have all the answers for the problems that face this country.

CNN: Thompson's September 7, 2007, speech in Des Moines, Iowa

But I think we have -- I think both sides have negotiated in good faith.

WHITEHOUSE: Press Briefing