I saw the man pull a gun out of his pocket.
我看见那人从口袋里取出了一把枪。
The purpose of this was to maintain the focus of their attention, just as Conley was focused on the suspect he was chasing to make sure he didn't pull a gun or throw something away.
目的是为了保证受试者集中注意力,就象康利专注于自己追捕的疑犯以确保他不会拔枪或扔掉什么东西一样。
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