Scientists aren't completely sure, and they have diverse ideas.

科学家们也不能完全确定，他们有不同的想法。

youdao

He was completely sure that he would find the carrot and the bone.

他完全相信他会找到胡萝卜和骨头。

youdao

I think the coffee beans are from Brazil, though I'm not completely sure.

虽然我不完全确定，但我认为咖啡豆来自巴西。

youdao

Jurors must find a defendant not guilty even if they are not completely sure the person is innocent of any crime.

VOA: special.2009.08.31

You feel physiologically aroused but you're not completely sure why, and you have to make up an explanation for it.

你感觉到性觉醒,但是不能确定是什么原因，你不得不给出一个解释。

耶鲁公开课 - 心理学导论课程节选

Still, it's worth reviewing these questions to make sure that we completely understand how to use this pattern.

但是，我们还是要回顾一下这个句型的要点，确保能够准确地理解这个句型的用法。

Who 课堂 - SpeakingMax英语口语达人

"As to where he's best, I'm not sure anybody's completely sure of that, " McBryde told BBC Sport Wales.

BBC: Hook's best position not settled

But experts are not completely sure what exactly the object is.

BBC: New 'moon' found around Earth

One doctor confided that he and his colleagues were not completely sure of the content of the toxic waste, and advised concerned patients not to drink milk in case the waste was radioactive.

BBC: Ivory Coast protester