说法有很多，看你用在什么场合了：What's up? (口语化的不正式说法，不是很礼貌）Wassup? (口语化的不正式说法，不是很礼貌）What's the matter?What's going on?How's it going?在正式的场合，建议用：May I help you?"
What can I do for you?
Do you have business？
what's up
