perfected

例句:

• I removed the fibroid tumours, using the techniques that I have perfected.
  我用完善后的技术摘掉了纤维瘤。
  
• The army had perfected the use of terror as a means of controlling the population.
  军队已经深谙利用恐怖手段控制民众之道。
  
• -- Measures for preventing and controlling industrial pollution have gradually been perfected.
  -- 工业污染防治措施逐步完善.
  
• Knee implants were largely perfected a quarter century ago.
  来自NEWYORKER
• I know my country has not perfected itself.
  来自WSJ
• Stokharin has perfected a painless death by poison.
  来自G. Vidal