Apples and oranges...

Posted by Niki on January 29, 2004

Hi, guys. I'm writing this post from Japan.

I've got a question about the phrase
"apples and oranges" I run across that phrase
very often, but I don't get the meaning.

Could anybody help me with this expression?
when, and why people say like that as an answer to other people's saying. and what does that mean?