1.adj. able -- unable   be able/unable to dov. enable —disablen. ability —disability / inabilityadj. disabled( ~ people) = people with                      disabilities 1)Tea enables me to keep awake.2) An accident disabled his left eye.
2 ambition n野心，雄心
A boy who is filled with ambition usually works hard.His ambition to become the Prime Minister is likely to be real.  他要做首相雄心可能会实现He has great ambitions.  他胸怀大志
be beneficial to sth./sb.   有益于   e.g. Sunshine is beneficial to plants.2) benefit ...