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Discussions have once again stalled.

讨论再次停顿下来。

《牛津词典》

The hapless, mangled galaxy may have once looked more like our Milky Way, a pinwheel-shaped galaxy.

这个不幸的、被破坏的星系可能曾经看起来更像我们的银河系，一个风车形状的星系。

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Experts still do not know what identifying objects those arms might have once held.

VOA: special.2010.06.23

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

Yeah, I actually, we have a concert here on Main Green once a year called "Spring Weekend"

是的，我们每年都会在梅因格林举办一场音乐会，叫做“春日周末”，

校园生活 - SpeakingMax英语口语达人

Many Republicans lost both their nerve and the principles that may have once guided them.

FORBES: Newt Gingrich Highlights Republican Futility On Spending

In their zeal, activists have once again failed to recognize the Law of Unintended Consequences.

FORBES: Fat-uous Approaches To the Obesity Problem

This suggests there may have once been conditions on Mars able to support life.

CNN: What we've done on Mars, and what's next