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Coincidentally, I had once found myself in a similar situation.

碰巧的是，我有一次发现自己曾处于类似的境地。

《柯林斯英汉双解大词典》

I once found a cheap apartment in Manhattan.

我曾经在曼哈顿找到一个便宜公寓。

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It can be treated when found early, but once it grows the chances of survival drop sharply.

VOA: special.2009.05.13

Censorship only comes into play once a text has actually been in circulation for a while, only after a number of readers have found a published text to pose a threat.

控制仅仅是一本书已经出版发行一段时间,一些读者已经发现这印刷的文本,造成威胁时才起作用的。

耶鲁公开课 - 弥尔顿课程节选

Or I have once been to a party and I found my shirt was misaligned, seriously misaligned, not one button but--Anyway, so--and so I feel when this happens I'm very immature.

或者有一次我去参加聚会,我发现我的衬衫扣错了，扣得很错，不只是扣错一粒纽扣，发生这种事时，我觉得太没面子了。

耶鲁公开课 - 心理学导论课程节选

As a British publication, Punch, once found, that is not a very profitable place.

ECONOMIST: Hard to digest

On one of her solitary girlhood walks, she once found herself accompanied by a lightning ball.

ECONOMIST: Yelena Bonner | The

Lauren Manuel, a South African travel blogger living in Malaysia, once found herself in a foreign country sans passport.

BBC: How safe is your passport?