We can core into that effectively look back in time.我们可以取出冰芯有效地追溯到过去

look back 回顾； 回头看

I still shudder when I look back on the past.

想起过去，我仍然不寒而粟。

She can look back on her career with great satisfaction.

她回顾自己的经历觉得心满意足。

in time到底，究竟，适时

We'd better look lively if we're to finish in time.

我们要按时完成，动作就得快

In time you'll grow to like him.

到时候你会喜欢他的。

Mike had to go back even further in time,迈克还得回到更早的时间

go back回去

The children have to go back to school next week.

下周孩子们要返校了。

How far does your memory go back?

你能回忆起多久以前的事情？