We had a good laugh about it afterwards.

我们后来对此笑了个痛快。

I was angry at the time but we had a good laugh about it afterwards.

我当时很生气，可后来却又觉得十分可笑。

Spencer can laugh about it now.

现在说起来，斯宾塞会大声笑起来。

We all had a good laugh about it.

我们都为这事大笑了一阵。

It's not a matter to laugh about.

这不是一件好笑的事。