(1) 能说得明确一点吗?

Could you put that in more specific terms?



(2) 我无法确定你的意思.

I'm not sure what you mean.



(3) 很抱歉.我没听懂你的话.

I'm sorry. I couldn't follow you.



(4) 你讲得太快了.我跟不上.

You're talking too fast. I can't keep up.



(5) 请你再多解释一下好吗?

Will you explain a little bit more?



(6) 你能说得简单一点吗?

Could you put that more simply?



(7) 恐怕我没听懂.能请你再说一遍吗?

I'm afraid I didn't understand that. Could you say that again, please?



(8) 对不起,我没听到,请你再说一遍好吗?

Excuse me, but I didn't hear that, would you mind repeating it, please?



(9) 抱歉,我没听懂,请您拼一下好吗?

Sorry, but I didn't catch that, would you mind spelling it, please?