research
  背景研究
  research
  研究
  Re-search v. t.  To search again; to examine anew.
  ◄ ►
  research
       n 1: systematic investigation to establish facts
       2: a search for knowledge; "their pottery deserves more
          research than it has received" [syn: inquiry, enquiry]
       v 1: inquire into [syn: search, explore]
       2: attempt to find out in a systematically and scientific
          manner; "The student researched the history of that word"