english: It's very difficult to develop new drugs, and the reason it's difficult to develop new drugs is because in the early stages of drug development, the drugs are very risky, and they're very expensive.
non_english: Veoma je teško razviti nove lekove, a teško je razviti nove lekove jesr su u ranim fazama razvoja leka ti lekovi su veoma rizični, i veoma skupi.