reach back的用法和樣例：
例句
- I asked him to reach back and try to recall his sufferings in the old society.
我要他回憶一下，把他在舊社會受過的苦回憶一遍。 - This custom can reach back Tang Dynasty.
這個風俗可追溯到唐朝。 - She looked back over a distance of ten years.
她回顧過去十年的時間。 - She never looks back to the old days with regret.
她從不懷著悔恨的心情回顧過去。
