Most of what we call geniuses are successful only because they have made extraordinary efforts.
what在句中作介词of的宾语从句的引导词.相当于一个名词+that引导的定语从句,
what= people that we call geniuses
Most of what we call geniuses are successful only because they have made extraordinary efforts.
what在句中作介词of的宾语从句的引导词.相当于一个名词+that引导的定语从句,
what= people that we call geniuses