我们换个话题吧!

Let’s change the subject.=Let’s talk about something else.=Let’s talk about something different.=I’d rather talk about something else.

言归正传。

Let’s get back to the subject.=Let’s get back to the point.=Let’s get back on track.

我现在不想谈那件事。

I don’t want to talk about it now.=I’d prefer not to talk about it.

那事儿以后再说吧。

Let’s talk about it later.

另外我们说说……

To change the subject...

好了，玩笑就到此……

Well, all joking aside,...=Well, seriously,...

顺便提一下……

By the way,...

你刚才说什么来着?

You were saying?

接着说。

Continue.=Carry on.=Please go on.

啊，我想起来了。

That reminds me.

别说了。

Let’s stop talking.=I’m tired of talking. =I don’t want to talk anymore.

那事儿我听过了。

I’ve heard the story before. =You’ve already told me.

这件事别再说了。

Let’s drop the subject. =Let’s drop it.=I don’t want to talk about it anymore.