on the contrary
(与此)相反,正相反 【说话中,写作中的转折】
You think you are clever; on the contrary,I assure that you are very foolish.
你自以为很聪明,相反地,我确信你很傻.
on the opposite 什么在什么的对面【方位上】
* This is Number 6,so Number 13 must be on the opposite side of the street.这是6号,那麽13号一定在街的对面.