在别人背后说坏话是不好的。

It is not nice to talk behind other people's back.

youdao

在别人背后说坏话是可耻的。

Don't speak ill behind him.

youdao

在别人背后说坏话是不对的。

It isn't right to speak ill of someone behind his back.

youdao

在别人背后说坏话是不对的。

It isn't right to speak ill of someone behind his back.

youdao