Katherine S.Pollard is a biostatistician at the University of California, San Francisco. 波拉德是美国加州大学旧金山分校的生物统计学家。
When the conductor knocked on the door, the head Biostatistician slipped their one ticket under the door thoroughly fooling the layman conductor. 当售票员敲门的时候，生物统计学家的头儿从门底下将他们唯一的车票塞了出去，非常成功的票过了售票员。
