That was an unusual class meeting.

这是个不寻常的班会。

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An unusual class of objects, ULXs emit more X-rays than stars, but less than quasars.

一类不寻常的对象，超亮度X射线源比恒星释放出更多的X射线，但比类星体的少。

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Alexandra took a local art class, and her teacher was amazed at the young artist's unusual style of painting.

亚历山德拉上了一堂当地的美术课，她的老师对这位年轻艺术家不同寻常的绘画风格感到惊讶。

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Another unusual feature is there are no class lectures;

VOA: standard.2010.05.12

But before I get started, I have to point out something a little bit unusual about this class We're being filmed.

但在我开始之前,我要告诉大家这个课程的一点特别之处,我们会被录像

耶鲁公开课 - 心理学导论课程节选

The lead plaintiff in a politically tinged securities lawsuit against Halliburton has taken the unusual step of asking the court to replace class-action king William Lerach with equally famous litigator David Boies as lead attorney on the case.

FORBES: Magazine Article

What's unusual is that the setting is this largely secularized middle class nation of 10 million.

NPR: Jihadi Peril Makes Its Way To Tunisia

Nonsurfers can head to the high seas for some world-class deep-sea fishing and may be surprised at their unusual level of success.

CNN: Can Nicaragua deliver on huge potential?