这是本月21日，加州大学伯克利分校的马修·沃克在圣迭戈举行的美国科学促进会年会上所作的发言。
So said U.C. Berkeley’s Matthew Walker February 21st at the meeting of the American Association for the Advancement of Science in San Diego.
他和妻子与住在圣迭戈的女儿到美国各地旅游了一圈，在纽约已经待了一个星期。
He and his wife traveled across the country with a daughter who lives in San Diego and had been in New York for a week.
在美国东部时间周五中午，由圣迭戈州立大学的自然灾害研究专家们发起的一项演习正在进行中，该演习希望了解社会媒体在危急关头将有怎样的反应。
At noon ET Friday, a drill was launched by natural disaster experts at San Diego State University to test how social media would be used to respond to a crisis.
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