Professor Stone says the emotional patterns could be linked to changes in how people see the world, or maybe even changes in brain chemistry.

VOA: special.2010.08.03

But it's all different degrees of terrible, if you will, because so many people in the population share that biological vulnerability and when the environment changes, we have the problems.

只要愿意,这造成的恐慌程度是不同的,因为在人群中有很多这样的群体,他们都有这种生物易损性,当环境发生变化时,就会出现问题

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

So I think there's just a lot of progressive thought in San Francisco, a lot of people pushing for changes.

旧金山有很多进步思想，很多人一直在推动着变化的发生。

进步的旧金山 - SpeakingMax英语口语达人

During the nineteen sixties, medical researchers discovered changes in the brains of people with the disease.

VOA: special.2009.04.07

For several years, many people had recognized the need for changes in the banking system.

VOA: special.2010.09.23

The map identifies changes in genes that may increase the risk in some people.

VOA: special.2010.11.02

But it is no fortune. While waiting outside the city's National Museum for the tourists to emerge, he talks about the changes in his half century of pedaling people around Phnom Penh.

VOA: standard.2010.06.14

(Speech) The former Czech Republic president said the changes in 1989 were "undoubtedly aided by people who,for long years" tried to show the world "the real situation" in what was then Czechoslovakia.

VOA: standard.2009.11.17