
date back (to...):to have existed since a particular time in the past or for the length of time mentioned 追溯到;始于;自...至今
The college dates back to medieval times.
這所學(xué)院創(chuàng)辦于中世紀(jì).
The custom dates back hundreds of years.
這一習(xí)俗可以追溯到幾百年前.