The war continued for an eternity.

那场战争持续了极长的时间。

《柯林斯英汉双解大词典》

After what seemed like an eternity the nurse returned with the results of the test.

过了漫长的一段时间后护士才拿着检验结果回来。

《牛津词典》

My schoolmates watched time crawl every afternoon, waiting an eternity for the three o'clock bell.

我的同学每天下午都盯着时间流逝，永远地等待着三点钟的钟声。

youdao

To end this historic conflict, both sides must be historically bold, because if each waits stubbornly for the other to act first, this will go on and be waiting for an eternity."

VOA: standard.2010.03.11

So, I don't think an eternity like that would be such a good thing.

我不觉得那样的永生,会是件好事。

耶鲁公开课 - 死亡课程节选

Yet even there, when I imagine an eternity of thinking about math--or for that matter, an eternity of thinking about philosophy, which I obviously like even more than math-- the prospect seems an unattractive one.

即使如此，当我想到让我永远,思考数学问题，或者说，让我永远思考哲学问题，显然和数学相比，我更钟情于它-,但这个提议也变得无趣。

耶鲁公开课 - 死亡课程节选

Reeling over an eternity of dunes I reach a second pan known locally as Deadvlei.

BBC: The ghostly shore of Namibia��s Skeleton Coast

Midterm elections may be eight months away, but in tech terms that's almost an eternity.

FORBES: Magazine Article

After what seemed like an eternity the building settled and the evacuation began in earnest.

BBC: The survivors' stories