I’m sorry, but may I interrupt you a few seconds?
(很抱歉,我能打斷您一下么?)
If you don’t mind, may I say a word here?
(如果您不介意的話,我想在這兒說上一句。)
Excuse me for interrupting you.
(對不起打斷您說話了。)
Just a moment please, I want to say something about the issue.
(稍等下好嗎?我想就這個問題說明一下。)