scientist       
noun [ C ] uk/ˈsaɪən.tɪst/ us/ˈsaɪən.tɪst/
B1 科学家
an expert who studies or works in one of the sciences
  a research/nuclear scientist 研究型/核科学家 
 - More examples
 - a forensic scientist
 - a team of scientists from the University of Miami
 - social scientists
 - A couple of decades ago scientists noticed Panama's climate was slowly growing drier.
 - There are scientists who say that the results of the research are flawed.