According to a classic study of laughter by Robert Provine of the University of Maryland, Baltimore County, and his colleagues, laughter is an unexpectedly serious business.

美国巴尔的摩马里兰大学的罗伯特·普鲁文斯和他的同事做过一项典型的研究。根据他的研究，笑是一件极其严肃的事情。

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Nevertheless, the company had won a raft of new contracts, including a deal to feed students at the University of Maryland Baltimore County and Eastern Conneticut State University in the US.

但是，公司已经获得大量的合约，包括一笔为美国巴尔第摩州马尔迪兰大学和东部康涅狄格大学的订单。

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Says Robert Provine, a professor of psychology and neuroscience at the University of Maryland, Baltimore County.

巴尔缔摩郡的马利兰大学神经与心理学的一位教授如是说。

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Last week I was honored to have President Obama visit my science classroom at Parkville Middle School in Baltimore County, Maryland.

WHITEHOUSE: Office of Science and Technology Policy Blog

The police chief of Baltimore County in Maryland, James Johnson, endorsed what he called the holistic approach urged by Obama to create a system that reduces access to guns for people who shouldn't have them.

CNN: February 1, 2013 -- Updated 0041 GMT (0841 HKT)

Twenty-five years later, I had made my way to the University of Maryland, Baltimore County.

CNN: Our 'outrageous dream': Bringing diversity to science