代 (自己) self,oneself,one's own;副 (自然;當然) certainly,of course,naturally,willingly;介 (從; 由) from,since ;
[例句] 發電站燒的煤產自魯爾地區。 The power stations burn coal from the Ruhr region.
[例句] 所有的皇家轎車都裝有電子自導引裝置。 All the royal cars are fitted with electronic homing devices.