We can core into that effectively look back in time.我們可以取出冰芯有效地追溯到過去

look back 回顧； 回頭看

I still shudder when I look back on the past.

想起過去，我仍然不寒而粟。

She can look back on her career with great satisfaction.

她回顧自己的經歷覺得心滿意足。

in time到底，究竟，適時

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

我們要按時完成，動作就得快

In time you'll grow to like him.

到時候你會喜歡他的。

Mike had to go back even further in time,邁克還得回到更早的時間

go back回去

The children have to go back to school next week.

下周孩子們要返校了。

How far does your memory go back?

你能回憶起多久以前的事情？