He might get there in time, but I can't be sure.

他有可能准时到达，但我不敢肯定。

《牛津词典》

I'm sorry, but I can't be sure about that.

不能保证会是这么个结果…但我会尽力做。

youdao

There's only good reviews, but I can't be sure those are legit.

有唯一的好评论，但我不能肯定这些都是合法的。

youdao

And he said, "Well, I believe there's a God, but honestly, I can't be sure there's a God.

之后他自答到,"我相信上帝,但说实话,我不能确定上帝的存在

耶鲁公开课 - 心理学导论课程节选

I'm going to go there initially, so I can move this over here, so I can get the base part of that over there, I want to put that one there before I put this over here, finally I get to the point where I can move the bottom one over now I've got to be really careful to make sure that I don't cover up the bottom one in the wrong way before I get to the stage where I wish they were posts and there you go.

我要先把其他的放到多余的柱子上，然后把最底下的放到目标柱子上，我要在把除了最底下的圆盘，其他的圆盘挪过来之前,把最下面的圆盘放在这儿,因此我得出了最下面的盘子,应该如何摆放的结论,当我没得到其他盘子的正确摆放位置的时候,要很小心的确认没把错误的盘子,放在最下面的盘子上面。

麻省理工公开课 - 计算机科学及编程导论课程节选

The talk is that most of these guarantees are for credit derivatives, or insurance against Greece not paying its debts - but I can't be sure that's so.

BBC: Eurozone woes are US woes

"I'm talking to the foundry to make sure the new statue can't be stolen again, " she added.

BBC: Tidworth war memorial statue to be replaced

"I said to him, 'it's not that we can't do this sport, it's because we don't understand it -- should we be exposed to it I'm sure we can do it, ' and that is how I got into it, " Vilane says.

CNN: STORY HIGHLIGHTS