It was on TV not (so) long ago.

电视不（很）久以前播出了这个节目。

《牛津词典》

There's no point wailing about something that happened so long ago.

事情早已发生，痛哭流涕也于事无补。

《牛津词典》

I only prayed with my first grandmother, but it is so long ago, that I have forgotten.

我只和我的第一个祖母祈祷过，但那是很久以前的事了，我都忘了。

youdao

He wore an old double-breasted suit, frayed gray shirt, wide tie, no hat "I left her so long ago I don't remember.

他穿着一件双排扣的旧大衣，一件散口的灰衬衫，和一条宽领带，没有戴帽子，“我很早以前就离开了她。

耶鲁公开课 - 1945年后的美国小说课程节选

This is another example, not so long ago--this is December 2003.

这是03年12月的图,也不算太久之前

耶鲁公开课 - 金融市场课程节选

There was a time - not so long ago - that virtually no one had a mobile, yet everyone managed to get by.

BBC: NEWS | UK | Education | Warning over 'bullying by mobile'

Your smartphone now harnesses the processing power of a multi-million dollar mainframe computer that not so long ago filled an environmentally-controlled room.

FORBES: What Does Silicon Valley Need from Washington? Less.

Not so long ago, government-controlled companies were regarded as half-formed creatures destined for full privatisation.

ECONOMIST: And the world should stay open for business