On Sunday,U.S.Homeland Security Secretary Janet Napolitano said at this stage there is nothing to indicate the 23-year-old Nigerian was part of a larger plot, but much more questioning will follow.

VOA: standard.2009.12.27

You show the baby, say a six-month-old, a stage with a block on it.

将一个木块放在平台上,然后让一个六个月大的婴儿来观看

耶鲁公开课 - 心理学导论课程节选