我没把握—如果你愿意我可以去核实。

I'm not sure—I can find out for definite if you like.

《牛津词典》

我们可以有把握地说，他会接受这份工作。

We can safely say that he will accept the job.

《牛津词典》

从讨论中我们可以有把握地得出一些结论。

We can safely draw some conclusions from our discussion.

《牛津词典》

Because you don't know how much more time you've got-- You can make a guess based on statistics, but as we saw, there's wild unpredictability.

因为你不知道你剩下多少时间-,你可以根据数据进行猜测，但是我们都知道，不可预见性太难把握。

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Or you can say "I'm not sure that" when you are uncertain.

或当你没把握时，你可以用 "I'm not sure that"。

I'm sure 课堂 - SpeakingMax英语口语达人

The mind can think about them, but justice itself--this perfect, this idea of being perfectly just-- that's something the mind can think about, but it's not here in the world.

心灵可以去设想它们,但是正义本身,即完美的正义这个理念,它是可以用心灵去把握的,尽管在现实世界里不存在

耶鲁公开课 - 死亡课程节选