The picture it paints of life in America at that time -- the parties,the automobiles, the endless fields of waste -- are unforgettable.

VOA: special.2010.11.28

It has a half-life of approximately three years at which time it stops decaying.

它生命的一半是三年,在三年的时候，它就停止衰亡。

麻省理工公开课 - 固态化学导论课程节选

Meanwhile, his youth was going away and now this imaginary student is now thirty-three years old never had time to marry or start a normal life.

与此同时，他的青春年华也已经逝去了,现在这位设想出来的同学已经33岁了,还没有结婚也没有开始正常人的生活。

耶鲁公开课 - 金融市场课程节选

Mister Armstrong also helped write a funny book about life as a full-time television watcher.

VOA: special.2010.03.28

Benjamin Hooks was born in 1925 in Memphis,Tennessee - a city,like most in the racially- segregated American South at the time, that discriminated against African-Americans in all areas of public life.

VOA: standard.2010.04.16

"they would like to receive a message that uses some kind of code, and instead of sending a message that reminds them of their pill, they would like a motivational message, like for example, 'it's time for your life.'" Services like that have been shown to work in low-income countries, and now they're starting to appear in richer countries.

VOA: standard.2010.02.24