VOA慢速英语:专家称非洲面临新冠病毒的“生存威胁”

existential –adj. related to existence

continent –n. a very large landmass

transmission –n. passing from one person to another

colleague –n. a fellow worker

region –n. an area separate from others, often very large

enormous –adj. very large

gap –n. a space between two things

tent –n. a shelter made of cloth

lockdown – n. forcing prisoners into the cells or measures to keep people in their homes