Once I forget something, it won't come back to me.

一旦我忘记某事，我不会再记起。

youdao

I once heard that, the only thing you can do when you no longer have something is not to forget.

我曾经听人说过，当你不能再拥有的时候，唯一可以做的就是令自己不要忘记。

youdao

The more you want to know whether you have forgotten something, the better you remember; I once heard that, the only thing you can do when you no longer have something is not to forget.

你越想知道 萔 自己是不是忘记的时候，你反而记得越清楚，我曾经听人说过，当你不能再拥有的时候，唯一可以做的就是令自己不要忘记。

youdao

"I'll never forget the day I looked down the microscope and saw something funny in the cultures, " Edwards once recalled.

BBC: Test-tube baby pioneer Sir Robert Edwards dies