proven       
adjective uk/ˈpruː.vən/ /ˈprəʊ.vən/ us/ˈpruː.vən/
 被证明的; 已证实的
shown to be true
  You've got a proven work record, which gives you a big advantage. 你有一个业经核实的工作记录,这给你一个极大的优势。 
 People on trial are innocent until proven guilty. 在被证明有罪之前,受审人是无辜的。 
 See: prove
 - More examples
 - They need to employ someone with a proven ability to get the job done.
 - a proven scientific fact
 - There is an expectation that it will soon become a clinically proven drug.