perfecting

例句:

• He spent more time perfecting his dance moves instead of gym work.
  他把更多的时间用于完善舞蹈动作，而不是健身训练。
  来自柯林斯例句
• Comrade Bethune was a doctor; the art of healing was his profession and he was constantly perfecting his skill.
  白求恩同志是个医生, 他以医疗为职业,对技术精益求精.
  
• -- Further reforming and perfecting the grain circulation system.
  -- 进一步改革与完善粮食流通体制.
  
• S.E. in exercise physiology to perfecting the female posterior.
  来自NEWYORKER
• Proud parents have been perfecting this genre for decades.
  来自WSJ
• I was not going to be perfecting my mogulling technique.
  来自THETIMES