But,it usually finds more susceptible populations to infect among the people who did not get the disease in the first wave.

VOA: standard.2009.09.04

All right, now just to get you used to the idea, in every class we're going to have I think the same two people, so Jude is the cameraman; why don't you all wave to Jude.

还要说一下,每节课我们都会,看到这两名工作人员,裘德是摄影师,大家跟裘德打个招呼

耶鲁公开课 - 博弈论课程节选