发布时间：2016-06-20 来源：新东方在线 发布人：
Sorry? / Pardon me? / Excuse me?
I'm sorry, I didn't hear/catch you.
I didn't understand. Could you repeat that?
Could you speak up a little?
I didn't understand what you are trying to say.
Could you explain with some examples?
Can you say again, please?
Come again, please?