返回,回到…话题上来,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}]