Chemical dependency can result from many things: alcohol, caffeine , illegal drugs like cocaine , legal drugs like pain killer s.
Chemical dependency can result from many things: alcohol, caffeine , illegal drugs like cocaine , legal drugs like pain killer s.
很多东西会导致化学依耐性的产生：酒精、咖啡因、非法药品，如可卡因，合法药品，如止痛片。