"And poor people tend to live in neighborhoods that are less safe and have fewer opportunities for physical activity."

VOA: standard.2010.07.02

In fact though, the children who you reward later on think that this activity has less value and they are less likely to do it when there's no reward present.

但事实上，拿到奖励的孩子会想,这个活动的价值变低了，如果没有奖励,他们就不太可能会再做。

耶鲁公开课 - 心理学导论课程节选

"I think the actions the United States military took the other night, the other day,yesterday could certainly have that affect where people are less inclined to engage in that type of activity,"

VOA: standard.2009.04.13

Last week saw positive U.S.economic news, with increases in home sales and housing prices, a jump in manufacturing activity, a drop in new jobless claims, and a new growth figure showing the economy shrinking far less than had been anticipated.

VOA: standard.2009.08.02