VOA慢速英语:Mobile Computer Lab Helps Thousands in Nairobi Slum

certificate – n. a document that is official proof you have finished school or a course of training

literacy – n. knowledge that relates to a specified subject

slum – n. an area of a city where poor people live and the buildings are in bad condition

solar panel – n. a large, flat piece of equipment that uses the sun's light or heat to create electricity