At previous summits, the United States set forth an ambitious and still unattained goal: forging a vast, hemisphere-wide free-trade zone.

VOA: standard.2009.04.15

but they can set up Internet. It gives them access to the information that is on the World Wide Web, so...

他们可以架起网络，这样就可以让这些国家的人利用互联网的资源。所以……

MIT赛艇选手 - SpeakingMax英语口语达人

Autism is a set of disorders, along a wide spectrum, that affects a person's ability to respond socially or form relationships.

VOA: standard.2010.08.09