nurse specialist       
noun [ C ] uk/ˌnɜːs ˈspeʃ.əl.ɪst/ us/ˌnɝːs ˈspeʃ.əl.ɪst/ (also clinical nurse specialist)
 专科护士
a nurse who has special skills, knowledge, and experience in a particular area of nursing
  Skin cancer nurse specialists are being sent out around the country to highlight the importance of sun protection.  皮肤癌专科护士被派往全国各地,向公众强调防晒的重要性。 
 She's a clinical nurse specialist in paediatric emergency and critical care.  她是儿科急诊和重症护理的临床专科护士。 
 - More examples
 - She is a clinical nurse specialist who treats women with postpartum depression.
 - Most lifestyle modifications are probably best coordinated through a heart function clinic run by nurse specialists.
 - The patient should be able to have private discussions, not only with the cardiologist, but also with the nurse specialist.