research       
 noun [ U ] uk/rɪˈsɜːtʃ/ /ˈriː.sɜːtʃ/ us/ˈriː.sɝːtʃ/ /rɪˈsɝːtʃ/ (UK also researches [ plural ])
B1 研究;调查;探索
a detailed study of a subject, especially in order to discover (new) information or reach a (new) understanding
  scientific/medical research 科学/医学研究 
 a research student/assistant/laboratory 研究生/助手/实验室 
 They are carrying out/conducting/doing some fascinating research into/on the language of dolphins. 他们正在对海豚的语言展开/进行/做一些很有趣的研究。 
UK His researches in the field of disease prevention produced unexpected results. 他在疾病预防领域的研究取得了意想不到的成果。 
 - More examples
 - He has dedicated his life to scientific research.
 - He emphasized that all the people taking part in the research were volunteers.
 - The state of Michigan has endowed three institutes to do research for industry.
 - I'd like to see the research that these recommendations are founded on.
 - It took months of painstaking research to write the book.
 
research       
verb [ I or T ] uk/rɪˈsɜːtʃ/ us/rɪˈsɝːtʃ/
B2 研究;调查;探索
to study a subject in detail, especially in order to discover new information or reach a new understanding
  She's researching into possible cures for AIDS. 她正在对一些可能治愈艾滋病的疗法进行研究。 
 Journalists were frantically researching the new prime minister's background, family, and interests. 记者们在疯狂地调查新首相的背景、家庭和爱好等。 
 - More examples
 - The amount of time and money being spent on researching this disease is pitiful.
 - We are researching the reproduction of elephants.
 - She researched a wide variety of jobs before deciding on law.
 - He researches heart disease.
 - The internet has reduced the amount of time it takes to research these subjects.