go back
 返回,回到…話題上來,追溯到


 go back
      v 1: come back to place where one has been before, or return to a
           previous activity [syn: return, get back, come back]
      2: belong to an earlier time; "This story dates back 200 years"
         [syn: date back, date from]
      3: return in thought or speech to something [syn: recur]
      4: regain a former condition after a financial loss; "We expect
         the stocks to recover to $2.90"; "The company managed to
         recuperate" [syn: recover, recuperate]