Is there such a thing as an on-screen English to Mandarin translator for Mac OS?

Preferably a translator that gives a popup of the Mandarin definition when you highlight your mouse over the English word.|||its not exactly wat u r lookin for ...... but hope it helps http://translate.reference.com/|||You can use the babylon for this purpose. It's the best translator in my opinion: http://babylon.gnds.info/?l=us|||You can use a plugin from http://offto.net/transanylanguage/