VOA慢速英语:Rocket Explosion Hurts Facebook’s Internet Plans for Africa

expensive –adj. costly

basic –adj. not including anything extra

affordable –adj. able to be bought without too much money

isolated –adj. far away from other things, separated from others

Wi-Fi –n. a wireless connection available over short distances

differential pricing –n. giving a different price to two or more groups for the same service

data plans –n. a plan in which a person pays an amount of money to receive a set amount of data over the Internet

solar –adj. have to do with, or provided by the sun