Years of civil war have 'drained' the country 'of' its resources. [=have used up the country's resources]
Nothing has been done to stop the 'brain drain' as more and more doctors move away from the area.
When the beans have cooked long enough to be tender, 'drain off' the water and set them aside.
(..) No one said this hero thing had to be a life time gig. You can't just quit either. That's when I got the brilliant idea... ...to fake my death. Copper drains my powers! You're weakness is copper? Once your death ray hit. I never felt so alive. So I borrowed a prop from a nearby nursing school. (..)2010 Megamind
(..) Your dark gift has finally paid off. It, it has? This dome is obviously lined with copper. - Yeah, so? - Sir! Copper drains my powers. Your weakness is copper? You're kidding, right? I don't think even he could survive that. Well, lets not get our hopes up (..)2010 Megamind