and that social norm is just something that's changed over time." And people share a lot.

VOA: standard.2010.07.23

And it's just very hard to change something that hasn't changed very much.

但是不经常改变的事物,想要改变是很难的。

斯坦福公开课 - 戴尔CEO-Michael.Dell谈创业和发展课程节选

How can something be changed utterly?

怎样才能彻底改变呢？

耶鲁公开课 - 现代诗歌课程节选

Also,for industry, salt in the composition of food products,is something that cannot be changed overnight.

VOA: standard.2010.04.22

They live much longer lives and they live to die of something else and the leading causes of death currently haven't changed very much since 1997 when this data was published: they die of heart disease and cancer primarily.

人们活的更久了,不过会死于另一些疾病,如今导致死亡的主要原因,并没有太大的变化,自一九九七年有相关数据公开开始,其显示人们主要死于心脏病和癌症

耶鲁公开课 - 生物医学工程探索课程节选

"And we are going forward and we will come out at the end of October, beginning of November, with this new approach because something has to be changed."

VOA: standard.2010.06.29