That's not a hard job. I'm sure I can manage it myself.

这活儿又不重我一个人顶得下来。

《新英汉大辞典》

Right now, I have the courage to life a life true to myself and what I think is best for now, and I'm not entirely sure those people can say the same about their lives.

现在，我有勇气过自己想要的生活，过对自己最好的生活。我不能完全确信，那些人对于他们的生活，能像我一样说出同样的话。

youdao

I'm not sure I learned much about his chances, but I learned a lot about myself and about this election.

我不确定我是否对他的竞选有了更多的了解，但是我对自己和大选都有了更深的认识。

youdao

I'm still not sure I can bring myself to try oranges again though...

BBC: Children with allergies 'being let down': Your comments

I'm not sure what I would have done with myself if the project became a disastrous failure -- and I think that uncertainty along the way became one of the biggest reasons I was so inspired to tell the story.

CNN: STORY HIGHLIGHTS

I'm not sure Cardiff are overlooked as such - it's just that people like myself thought there would be three or four teams pulling away in the Championship by now, with the three teams who came down from the Premier League among them, and that has just not happened.

BBC: Ask Steve Claridge