●ˌdate ˈback … ( ˌdate ˈback to sth) to have existed since a particular time in the past or for the length of time mentioned追溯到；起始于◆It’s a tradition that dates back at least a thousand years. 这一传统至少可以追溯到一千年前。◆Her problems date back to her childhood. 她的这些问题从小就有了。◆The town dates back to Roman times. 这座城镇始建于古罗马时代。[v + adv][v + adv + prep]