They pass quickly, sometimes never to return again.

有些机会很快与我们擦身而过，更有时不会再有。

youdao

Great opportunities to serve never last long. They pass quickly, sometimes never to return again.

服侍的好机会不会一直出现，它们转瞬即逝，有时也一去不返。

youdao

The death of a single human is a tragedy, one that survivors sometimes never recover from, and we prize the individual life above all.

每个人类个体的死亡都是一个悲剧，逝者已矣，生者有时却永难释怀；而且，我们认为人的生命高于一切。

youdao

Those who sometimes ate curry, or ate it often or very often, did better than individuals who rarely or never ate curry.

VOA: special.2009.05.19

When we transfer both,one hemisphere might work sometimes, sometimes the other hemisphere,but never both.

当两半大脑移植时，有时半边能用，有时另外半边能用，但从不能同时。

耶鲁公开课 - 死亡课程节选

If souls can't split,it can only follow one half of the brain, and that's why we'll get somebody that's got one half, sometimes the other half,but never both halves.

如果灵魂不能分割，只跟随一半大脑，才能有只有其中一个得到半个大脑的人存活，而没有两人同时存活的状况。

耶鲁公开课 - 死亡课程节选

He said he's discovered little of the dysfunction often associated with the rich, even though he's sometimes never met the father, even after working for the family for years.

WSJ: Not for Dolts Anymore

Sometimes they never do.

FORBES: Dell Buyout: A Costly Deal For Largest External Investor--A Longtime Supporter

You do things sometimes you have never been asked to do in any other context.

BBC: McGeechan hails outstanding Lions