I am sure, it was a song sung by the animals of long ago and have been lost to memory for many years.

我敢肯定，这是很久以前动物们唱的一首歌，而且多年来已被遗忘。

youdao

Mr. Assad, who has a long memory, will not have forgotten that meeting.

好记性的阿萨德先生不会忘记那次会面的。

《柯林斯英汉双解大词典》

He had a long memory for people who had disappointed him.

谁让他失望，他总是记恨在心。

《牛津词典》

A visitor still remembers the memory aid she learned long ago from her fifth-grade teacher.

VOA: special.2009.12.07

One was that Apple fanatics were almost entirely devoid of long-term memory--no matter how many times the company exploited their ardor, hoisted shoddy products on them or simply ignored them, they would instantly forgive and forget everything once the news out of Cupertino, Calif.

FORBES: Apple R.I.P.

Because his long-term memory is better than his short-term memory, Bordisso moved back to his childhood home in Sacramento, California.

CNN: In early Alzheimer's, work is possible with support

The so-called autonomous adaptive structures are part of a long-term research into shape-memory healing which could impact long-term developments of implantable medical devices, for instance.

ENGADGET: Shape-memory polymer knows when it's hurt, fixes itself