This experiment was eventually something of a success – but I'm still not sure I can face doing it with kidneys.

这个实验最后就是一种胜利——但是我仍然担心我的肾脏能不能接受它。

youdao

I'm not saying I don't watch TV - I watch DVDs, so that I'm sure that what I'm watching is something great, rather than the useless stuff you find on TV most of the time.

这并不意味着我不看电视—我看DVD，因此我能确保我看到的是高质量的节目，而不是你通常在电视上看到的那些无聊的节目。

youdao

I'm not sure that's something that needs to be at the beginning of the conversation.

我不能确定，这需要出现在会谈开始时。

youdao

Then again, if you are not certain of something you can say "I'm not sure."

同样的，如果你对于一件事没有把握，你可以说“I'm not sure.”

I'm sure 课堂 - SpeakingMax英语口语达人

"I'm not sure what the position is yet but would guess it is something in the hospitality section of the new stadium, " said Curtis.

BBC: SPORT | Football | My Club | Swansea City | Curtis hurt by Swansea dismissal