Another way that you can use, which we often use to be polite to the other person, is rather than indicating that you are in a hurry to go, you turn around, and you say to them: "Well, I won't keep you any longer, you're probably busy."
另一個常用的禮貌道別方式,就是暗示對方你有急事必須離開。你轉身,並說:「我就不耽擱你了,你大概很忙。」