Translation:We eat fruit, and they do not eat fruit.
CAN WE PLEASE HAVE A SLOWER AUDIO FOR WHEN YOU DO NOT HAVE THE TEXT IN FRONT OF YOU AND ARE JUST WRITING DOWN WHAT THE SPEAKER IS SAYING? In other languages on duolingo, they have the "turtle" option, where what the person is saying is slowed down so you can hear each word independently. Also sometimes it's hard to distinguish if they are saying an N or an M.
It is similar to "but" you are right. Conjunction "а" is used to express contrast. In English sentences "and" is often used in such cases.