VOA慢速英语:Bringing the Internet Closer Helps Students

短语讲解：

1. "The only challenge I am having here is the power supply, sometimes it will just go off."

go off 进行; 爆炸; 突然大作
例句：He fired but his pistol failed to go off.
他试图开枪，但没有打响。

2. He says, now, it is available for 40,000 students and teachers.

be available for 有效
例句：Large blocks of resources must be available for major investments.
重要投资项目必须能获得大量的资源。

3. There are fears that students may waste time on social media networks like Facebook and Twitter instead of spending it on school work.

instead of 代替…， （是…）而不是…
例句：A spirit lamp burns spirits instead of oil.
酒精灯里点的不是油而是酒精。

4. Hundreds of schools, clinics and universities are connected to it in Africa, Southeast Asia and many other places.

hundreds of 好几百，许许多多
例句：Hundreds of steps lead to the high walls which surround the president's palace!
数百级台阶通向总统府周围的高墙。