1、announce
宣布;宣告;公布
He will announce tonight that he is resigning from office.
他将于今晚宣布辞职。
She was planning to announce her engagement to Peter.
她正计划宣布她和彼得订婚一事。
大声宣告，郑重地说（尤指令人不快之事）
Peter announced that he had no intention of wasting his time at any university.
彼得宣称他无意在任何一所大学浪费时间。
'I'm having a bath and going to bed,' she announced, and left the room.
“我要洗个澡然后上床睡觉，”她大声说完便离开了房间。
（机场或火车站工作人员通过扬声器）播报，通知
Station staff announced the arrival of the train over the tannoy.
车站工作人员通过广播告知火车到站了。
They announced his plane was delayed.
广播通知他所乘的航班晚点了。
2、go back
追溯到；回溯到
The feud with the Catholics goes back to the 11th century.
与天主教的夙怨可以追溯到11世纪。
Our association with him goes back four years.
我们同他的合作是从4年前开始的。
回到（过去）；回顾
If you go back to 1960, you'll find that very few jobs were being created.
如果回到1960年，你会发现工作机会寥寥无几。
