diligence       
noun [ U ]  approving uk/ˈdɪl.ɪ.dʒəns/ us/ˈdɪl.ə.dʒəns/
 勤奋,认真
the quality of working carefully and with a lot of effort
  She hoped that her diligence would be noticed at work. 她希望她的勤奋能在单位里得到注意。 
 The exhibition has been researched with extraordinary diligence. 展览经过了非常认真的研究。 
 See: diligent
 - More examples
 - His diligence motivates others to give a little more.
 - This is a matter that requires the utmost diligence.
 - They carry out their duty with diligence and care.