没把握的英文：
not so sure

参考例句：

You can never tell.
不知道/谁也没把握

What I was uncertain about was whether we could overcome the difficulties all by ourselves.
我没把握的是我们能否单独克服这些困难。

sure是什么意思：
adj. 确信的，一定的，确实的
adv. 的确，一定，当然

brassard: "Sure, sure."
布拉萨尔:“当然，当然。”

Make sure you get there in time.
一定要准时到达那里。

Be sure not to let the truth slip.
千万别把真相泄漏出去。

A clear conscience is a sure card
光明磊落，胜券在握。

Make sure you are not dividing by zero.
确保不会除零。