speech therapist       
noun [ C ] uk/ˌspiːtʃ ˈθer.ə.pɪst/ us/ˌspiːtʃ ˈθer.ə.pɪst/
 语言治疗师
someone whose job is to treat people who have difficulty speaking
  A speech therapist helped him overcome his stammer. 语言治疗师帮助他克服了口吃。 
 See: speech therapy
 - More examples
 - A speech therapist can identify mechanical problems (such as tongue thrusting) and teach your child the appropriate exercises to correct them.
 - A speech therapist will advise on language activities parents can carry out at home.
 - Increasing numbers of call-centre workers are being referred to speech therapists because they are losing their voices.
 - It was not until a referral to a speech therapist that the four-year-old George was diagnosed.
 - Speech therapists address communication difficulties in comprehension and expression, as well as fluency and voice.