1. Sorry to interrupt you, but will you first let us know your idea of annual sales?
2. May I interrupt you a moment?
3. Excuse me for interrupting you. I hope you will explain yourself in more detail.
4. If you don't mind, may I say one word here?
5. Just a moment, please. Allow me to say something here.

中文参考：

1. 对不起打断您的话，不过请先谈谈您对年销售量的看法。
2. 打断您一会儿，可以吗？
3. 对不起打断您的话，希望你能解释更详细点。
4. 请别介意，我可以插一句话吗？
5. 请稍停一下，允许我插几句话。