eureka       
exclamation  often humorous uk/juˈriː.kə/ us/jʊˈriː.kə/
 (成功做到某事时发出的欢呼)我发现了,我找到了,我成功了
used to show that you have been successful in something you were trying to do
  "Eureka!" she shouted as the engine started. “我成功了!”随着发动机的启动她欢呼起来。