追溯到
... It's time to v. （句型）是做某事的时候了。 go back as far as 追溯到… graduate system 研究生体系 ...
有些国家的数据没有其它国家的年限长。
It's time to start a list of everything you really love to do. Go back as far as you can remember.那么现在是时候去把你喜欢去做的事情全部做成清单了，你能想起的所有活动都可以。
If we could go as far back as a million years, that would be perfect.如果我们能追溯到百万年以前的，那将就太完美啦。
